Should you talk about politics or religion in a college essay? Uumm... it depends. For one, you have to take into consideration to which schools are you sending this essay to or i.e. how would they take it? It would be better off if you didn't have as a central theme in your college essay such a divisive topic but if you have a very strong opinion about it, there are ways to address it without getting your application into the REJECT pile.
Check out this article which talks about whether or not you should talk about politics in your college essay and if you do, how to go about doing so: