If that were true then areas with concentrated poverty should have negligible crime - why bother robbing anyone if everyone is poor? Yet that is the exact opposite of what is seen in reality.
A single concentrated poverty spot naturally doesn't work like that. It is immersed in a culture that shows it the income and wealth inequalities, as well as uses them to justify violence.
But when a country is universally poor but has a working and stable government, you may have surprisingly low crime rates. But then, such a country often doesn't stay poor. (Look at China...)
So the poor commit crimes against each other solely because rich people exist somewhere else and don't interact with them?
Malaysia is oddly anti-semitic for a country with about 0 Jews. I'd expect that if the Jews were causing all the problems, then Jews would actually need to exist in-country. But now you are making me re-think; is it plausible that simply by existing somewhere else, the Jews cause Muslims to engage in bad actions that harm themselves?
I don't understand your general principle. When is it reasonable for one group to blame their actions on the existence of some far away out-group?