If you grew up in a homophobic household, you might be homophobic too. Many discriminatory people quickly become accepting when a friend or family member comes out these folks simply never thought about homosexuality in terms of the people they know and love. Their ignorance is diminished, and along with it, their fear. Others have discrimination so deeply rooted in their minds that it takes precedence over their love for their friends and family. These folks have discrimination pretty well entrenched in their approach to life, and it would take a lot of hard work for them to change.
Alliance is a proactive act of self-love.
When you assert your alliance, you prove that it doesnt matter what differences lie between you and anyone else, you respect all human creatures as equals. Such universal approval only happens when feel no need to protect yourself from others. When you're not afraid of other people, you can love them. Alliance is a proactive act of trust. Not only does alliance indicate trust in the people to whom youre allied, it shows trust in discriminating people.