"Love is good. Isolation is bad. If two people are in love, they can marry. It's that simple. You don't have to look at anybody's gender."

Um, marriage isn't just about love, also the nature of heterosexual and homosexual "love" is very different.

From the article I linked above:

Marriage: Originally, within the lives of older married people, an irrevocable commitment to live together and raise the resulting children. Now the point of marriage is divorce, the legal authority of the wife over a husband on pain of confiscation of his assets and income. Some people attempt to use Church and social pressure to enforce old type marriage, but hard to find an old type church. Because “gay marriage” means a pair of gays cruising together to pick up boys, an effort is under way to redefine marriage yet again as a pair of people of either sex cruising for pickups but it is probably that this redefinition will fail, because it is hard to get a good wingwoman. Therefore, probably will continue to mean matrilineality and female headship. The feminists and the gays are fighting over this one. Feminists want “marriage” to refer to the female headed family, while gays want it to refer to cruising for pickups.