Since this is in the "ultralight" forum, I'll address some of these items from the ultralight POV:
1. Backpack - consider a frameless model, which can weigh less than 1 lbs. You then use your closed-cell foam pad to help create a quasi-frame, since you aren't going to be sleeping on it while hiking, and that heavy frame is not doing you any good at night. Frameless packs are rated at lower weight capacities, but this is where the synergy of ultralight starts coming into play - if you have been cutting everything else down, then you will have less to carry. Focus on the big three: pack, sleeping system (tent), and sleeping bag. Take off the weight on these, and that's where you will see the big savings.
2. Rain cover for backpack. Remember that 7 months of the year, it does not rain at all in Israel. Leave this at home unless you're going to be hiking December-February AND the forecast is for rain.
4. Hiking shoes - consider going with trail-running shoes instead of the big clunkers. The rule of thumb is that every ouce (gram, pound, kilo) that you cut off your feet is equivalent to cutting five times as much off the weight in your pack. Remember, every step of the way from Dan to Eilat, you have to lift those shoes up in the air, only to put them down a moment later. There are those who will claim that boots give better support or whatnot, but again, if you're in the midst of cutting all of your pack weight, then there won't be as much to worry about.
5. Crocs, if you happen to be one of the weird people like me who have taken out a scale and weighed them, are actually quite heavy. Try a pair of cheap, flimsy, and LIGHT flipflops. This will get you through the questionably-clean showers you might encounter, provide an alternative to your shoes during the evening, and won't weigh you down as much along the way.
7. Bandana - only if you are going to be using it extensively. If it's going to be hanging out inside your pack mostly, forget about it. Know your personal style, and pack accordingly.
8. Sunglasses - if you are already a glasses-wearer, instead of a second pair of glasses, consider clip-on shades that lack the full body (=excess weight) of a second pair.
9. Sun screen - like all consumables, take only a small amount, and then include refills in your supply drops along the way. If you get home and you're still carrying excess sunscreen, then that amount was doing nothing more than weighing you down the whole way.
15. Sleeping bag - rated for no more than the weather you will face, and possibly even higher temperatures. Also, consider taking a quilt (blanket) instead of a full bag. See my notes in the "sleeping systems" thread.
16. There are many super-light-weight towels out there, so leave the heavy-weight terrycloth beach towel at home. If your friends don't make fun of your towel for being too small and flimsy-looking, it's probably too big.
18. Shorts - If you are bringing convertible pants (#17), then you already have a pair of shorts. Leave the extra pair at home.
19. Bathing suit - underwear, if you are bringing it, will probably suffice, or possibly your convertible pants, which are probably also fast drying. Extraneous weight!
20. 2 shirts - leave one at home.
21. 3 pairs of socks - leave one at home. Wear one, and have the other one drying out on the outside of your bag from just having been washed. Socks are critical to your hiking success, so they are the one area where some level of redundancy is acceptable. But don't start going crazy with three pairs.
22. 3 pairs of underwear. Definitely carry no more than two, and see if you can cut it further down (one or none).
23. Fleece jacket - again, make sure that it is exactly as heavy as you are going to need, and no heavier. If it stays in your pack the entire time, it is (you guessed it) a waste!
24. Rain gear - see my note about #2
25. Flashlight - try a LED button-light, like the photon freedom micro.
27. Cookware - recognize that most of the cookware is a waste. Research the "freezer bag cooking" method to see how your entire kitchen can be no more than a single "pot", tin can (formerly a container of cat food), and a lexan spoon. The purists would go even light on the spoon, preferring a fast-food disposable spork.
28. Spare? Why not put it in with your food drops? And why carry a gas system when an alcohol-based cat-food stove is lighter?
29. If you already have a cooking pot, you have a cup. And if you already have a cup, you also have a food bowl. Leave the unnecessary redundancy for moon missions.
30. Knife AND Fork AND Spoon? As they say in Hebrew, "Haval" (It's a shame...). If you insist on fork-capabilities and knife-capabilities, consider the Light My Fire spork. But for your back and knees' sake, please don't carry all three.
31. Can opener - would seem to be implying that you will be carrying cans as well. They are very heavy, and often contain a lot of fluid with you pour out. Both of these are a waste. Consider re-packaging your food before you leave to keep that unnecessary weight off your back.
38. Plastic mirror - are you going out hiking in order to look your best, or in order to enjoy your surroundings? If the latter, then you are only served by having as little weight on you as possible, since the opposite will just cause you to suffer with each step. Most civilization you will come in contact with (in the north, primarily, but also at the places you might pop into in the south) will usually have a mirror for your FREE use.
39. First aid is another great area to cut down weight, but like many others, it requires knowledge. Educate yourself about what you are likely to run into (buy a book on wilderness first aid or take a course), and then ONLY bring what you need. 300 bandaids is a bit much. You are not trying to build a field hospital, and the likelihood is that (god forbid) you get into more serious situation, you are going to have to go to a hospital anyway. The upside about Israel being a very small country is that it is never too far from a hospital.
42. If you are carrying a guide and a map that carry more than your sub-1 lbs backpack, that is a sign that the guide is too heavy. Cut it up, and take only the section relevant to your particular section. This too gets into the logistics of supply drops.
43. Compass - realistically, you have no need for this in the small country of Israel. The sun comes up on the Asia side, goes down over the Mediterranean, and you are never really that far from a road. Leave it at home.
45. Binocular - leave at home, for the trips when you will be driving a car to a nice bird-watching site, rather than shlepping everything you have on your back the length of the country.