Anything the US, UK or EU do will be criticised as colonisers taking over and give the marchers more reasons to scream support for globalisation of the intifada
Very true, @Ihatetomatoes, but then if they don't act they'll be slammed for that too by those who have convinced themselves that absolutely everything is the west's fault
Good luck expecting some sort of arab coalition to sort things out though; the overall attitude seems to be that as long as it doesn't affect them directly they're not too bothered, and that inter-arab relations matter more than Palestine itself, so I'm not seeing an answer there