So I will reiterate, it is the principle of exclusion that puts it on the same spectrum. No they haven't and I will assume most likely will not cause a genocide. However, principle...matters. It is unwise to perpetuate the same beliefs and systems of an oppressor and expect a different outcome! 'Only certain people of a certain group because of race and gender can be here'.
Since you insinuated I could know nothing of the subject because of my background, and then upon revelation suggest I should know better because of it, I'd suggest to you that instead of making assumptions about me and my background what I should be like, and chaffing at the fact that I don't fit the mold of someone you'd expect with this background, maybe heed what I have to say as it is from a unique position that is not common.
As far as I can tell, your argument is,
1) BGC starts out by identifying a target population based on race.
2) All genocidal massacres have begun with this step.
3) Ergo, BGC may result in a genocidal massacre.