Hating on OP is stupid, unless it is because you are saying to be pro abortion, in that case everyone deserves an opinion.
But hating him, saying he "deserved it" and that it was his fault is loving stupid, it wasn't intentional, you are, by blaming him, blaming and disregarding everyone that has love before the age you personally think is good to have children, which is childish and idiotic. Teens have love, at least socially active ones do, it happens, her getting pregnant is not OPs fault.