As I understand it (and my understanding is superficial in the extreme, I will freely admit) the Ultra-orthodox are one of the poorest segments if not THE poorest segment of the population with nearly half living below the poverty line.Are not the ultra orthodox financially supported?
Of course they did - the poor will always fight amongst themselves because they have the strongest incentives to do so. In this respect there is, of course, a parallel with Northern Ireland (and a fairly universal one at that). You are spot-on in raising that issue. My point in respect of the Northern Ireland Troubles was merely that the Catholic v Protestant conflict there was not necessarily along the same lines as the Arab v Jewish conflict in Israel albeit the underlying mechanisms at work being very much the same.The Arabs fought amongst themselves as well.
An interesting corrollary to this is that it is not just the poor that suffer from evident poverty. The well-off that come in contact with the poor are also made unhappy by this with quite a bit of data to show that residents of affluent neighbourhoods that border deprived neighbourhoods suffer siginificantly higher rates of depression, suicide and other negative quality-of-life markers compared with control neghbourhoods that do not, even when you control for such factors as being the victim of crime (rich people living near to very poor people are more likely to ber burglarised or mugged - there's a shocker!). Some researchers have put that down to feelings of 'guilt' about ones good fortune - bit like 'survivors guilt'. Be that as it may, some of the better-off allay their discomfort by doing charitable work to help the poor while others (probably the majority) just want the poor removed far, far away so that they no longer have to be inopportuned by them. This, I would suggest, has some obvious implications for many of the conflicts to be seen around the globe, supposedly about ethnicity and religion, etc.