Patriarchal heterosexuality - male domination - is tied to homophobia. Another common assertion within feminist theory, well-developed in Suzanne Pharr's Homophobia: A Weapon of Sexism. Inverness CA: Chardon Press 1988.

Suzanne Pharr has written often about the interconnections between homophobia and other oppressions in our society, e.g., "Divisions That Kill";

Here is the transcript of Pharr participating in an online ACLU forum

Roots of Homophobia
by Daniel Goleman (NY Times) corroborates this connection as well.