Yes Cossy, I repeat, most of us would surely like all that conflict to stop. And there are also many other terrorist, political or tribal spats going on round the world, shoved off the news by the Gaza problems.
HOWEVER, for the umpteenth flipping TIME, absolutely NOBODY, that's a zero quantity, nil, nada, nowt (etc) of the people heading up Hamas, the Iranian despots presently claiming to be running credible elections (haha), and certainly not the Israeli Govt could give two hoots (or as many hoots as you like) as to WHAT demos are happening here, round Europe, in the USA, or anywhere else.
Anyone taking part may well be making their own conscience feel a bit better, but it's a total waste of time, fuel, and/or bus and train tickets, and for the police having to patrol such things.
The ONLY realistic solution there is the '2-state' one, with Palestinians living peacefully alongside Jews as they have for very long periods throughout history. Jews have every right to be there, check the foundation of Jerusalem several thousand years ago, it's a big clue. As to how they reach that point, well, all letters of suggestion would be welcome. Send a few to the UN, who are clueless and powerless on so many fronts. But waving Palestinian or Israeli flags in central London, or anywhere else, has about as much chance of success as say, Thames Water's chances of fixing the leaks in the London sewerage system with a packet of Blu-Tack?