The militant camp feels the only way to right the wrong they perceive is through positive action and active repression of the repressors. The inclusive camp feels that incremental change that improves the injustice they see will, given enough time, right the wrong without the need for punitive actions.
This has been the case with civil rights (MLK vs Black Panthers), environmentalism (WWF vs GreenPeace), animal rights (ASPCA vs PETA), and on, and on...
If I had to guess, I'd suppose that activists tend to break down along these lines because those they oppose break down in a similar fashion. There will be those who embrace the injustice and actively defend its existence. Then there will be those who don't perceive the injustice, or don't recognize its severity, but are open minded and willing to change.
I point this out, because I think it's useful to recognize these camps and to which you belong. I'm not willing to say one is right and the other is wrong. I suspect both are necessary to some degree. But if you look at the whole discourse in question here, some of the most disheartening exchanges are between individuals on the same side of the issue, but in different camps.