Because I think, although there is still a lot of racism in our society, people can still more easily understand the problems of their social propositions when placed in such a context.
This goes back again to my last post on beliefs and consequences, particularly this idea of "forcing" beliefs on another person and how some suggest we should not oppose people's beliefs if they are not forcing them on us. There is still the big question of what that means, so I've come up with a scenario to pry at that.
In the context of the last post, the topic was gay rights. Well, I'm not gay, so if someone is opposed to gay rights, does their opposition have much of an effect on me? Should I care? My answers are "Yes" and "Yes, duh!" respectively. But now let's change the context to the civil rights era of the 1960's. Anyone can see from my profile picture on the right that I am white. So if the problem had instead been with people who promote segregation, I'm still in the majority group. I have my rights. Should I be opposing people who are for segregation even though I am not black???
I think the answer should be obvious. Damn right I should oppose it! And the same goes for those who oppose gay rights today. I'm going to fight against that. It doesn't matter that I'm straight. I'm not selfish. I want to see the world be a better place.
Religion does not make the world a better place, and often it works against my goals. So I'm going to fight against it. I don't care if people aren't forcing their beliefs on me. It's not about me. It's about everyone else.