>The behaviour here is the repression and marginalisation of a political group, deemed unworthy.

a political group is something you choose to be a part of. This is significantly different from, say, skin color.

significantly different in the sense that now it's ok to be repressed and marginalised?

First, what of religious groups?

Second, there's' a bit of a slight of hand here. Many political groups claims to be representative of "demographic" groups, or at least the distinction isn't clear. Are pro-Israel groups demographic or political groups. What about about demographic groups that disseminate political opinions and actively get involved in political discourse?