Sentence:  Unfortunately what we have going on in this world against the new Israeli State, is just like what the Arabs do to their own, as they <WSD>infight</WSD>, among Muslims, and different nationalities, and sects, just as the many Christians do, and mostly did during the times of the Protestant revolution, and exodus and expulsion. 
Meaning of the word marked with <WSD> tags:  To fight with allies or other members of the same group.