Yes they should, First we're all humans hence we all should have the same rights. Furthermore, we are currently living in a secular state, where religion does not tell us what is right and wrong anymore. In other words, religion may still have somewhat influence in those who believe in its ideology, but Religion does not have the power as the State has. And, according to the last, a union between two people, or marriage, is a right that every citizen has. Therefore, gays should definitely be able to get married.