The fact that you felt the need to preface your post by explaining you believe in equal rights shows how ridiculous these sorts of issues have become.
To call anything along these lines "discrimination" is an absolute joke and is completely demeaning of actual discrimination. Developers can make any kinds of games they want and include any kinds of characters they want. The audience can then judge them by voting with their wallets. If people are that desperate for a game with gay characters, for example, any game that plays to that view will then see a lot of success. That's built into the free market idea. All you're seeing when people make a lot of noise on this is groups who want an over-representative say in what goes on.
In conclusion: Stop reading Polygon and Kotaku.
