religious and political motivation go hand in hand, some would say they are even the same thing, this seems like a super biased question and you will only get biased Answers but it depends on the context.
for example in places with separation of church and state it should be blamed on political motivation but it's commonly ignored and lots of time's political motivation is based off of someone's religious beliefs so what really caused it?
both, they are practically the same thing.
in a place with out seperation of church and state most political ideas are religious so there is no line between them.
basically what i'm trying to say is this question is kinda lame and whoever asked it is being biased and you will only get biased Answers, unless i can get more context this is probably the closest thing to a Answer that ur gonna get.