> Lots of countries (including many western countries) have some ethnic parties. That does not mean people will vote for their ethnic groups party - in general most will not.

You can vote among ethnic lines without voting for an explicitly ethnic party, which is why Muslims almost invariably vote for leftists even though they are significantly more socially conservative than the most right-wing conservatives, but you know this, you just pretend that you don't know this. This is your SOP.