Banning gay people from marrying in Church (or mosque etc) is no different in my view to the dreadful treatment of black people during apartheid and segregation. "We whites can use these toilets, these buses and these schools, but you blacks cannot."
Any discrimination is 'phobic'.

As Steve so rightly says, gay marriages have no effect on other folk at all. It's none of anyone's business if two people of the same sex want to commit themselves in marriage to each other, in a religious setting or otherwise. In fact, any public statement of commitment and permanence of a relationship will stabilise society in general.

It must be so hurtful and provoke feelings of bitterness and rejection to be refused the privileges of a religious marriage on the basis of one's sexuality. And to be refused by the very people who claim to promote love and goodwill is doubly disgraceful. It smacks of hypocrisy... No, that's wrong. It IS hypocrisy!