I'm going to skip over your appalling attempt to re-characterize the Jews as aggressors in Germany.

You ask: Why is this only happening in "white" countries?
Answer: A hypothetical "war against white people" can obviously only happen where white people are. So, your question is kind of redundant.

Are you claiming that there aren't race-based conflicts elsewhere in the world, that do not involve white people at all? There are PLENTY. The US has tried to intervene in a number of them. Want a list?