I hear ya.
What I would say to Cousin Gem is that young white guys like me, in their 20's, early 30's, or even younger have, for the most part, never oppressed anyone. We've been more or less screwed, arguably to a lesser degree, by the exact same parties you have legitimate grievances against. We really had nothing to do with it.
Having a movement based on some of the legitimate issues I commented on in this thread, many of which Gem correctly identified, that you limit based on race is, by definition, extremely fuckin' racist. It prevents a lot of people who would be on your side about these things from being able to "get there", and perhaps more importantly, it allows your opponent to __correctly__ brand such a movement as racist. Once you are seen as racist, it becomes social suicide to listen to you. Such a movement is perpetually relegated to the fringe. It creates a cycle that furthers the oppression of its members.
You don't see all that many "Malcolm X Blvds".
You have to look cleaner than your opponent to win the game of social politics.