Since judaiesm, christianity, and Islam all worship the same god

Persecution often starts from political rather religious grounds

Hi! No, these three religions don't worship the same god. While it can be argued that jews and christians worship the same god (although I don't personally believe they do), Islam believers don't -they worship allah - not the same. One of the reasons for the persecution of jews is not religious, it is because other nations want their land. That's what most of the fighting is over at this point in time.

shouldn't be but people will fight over stupid things, just look at northern ireland got the catholics and protestants fighting for years and they believe in the same bloody religion, only a few very minor differences.