Assimilation

Hello A year ago, I came across a video by Yosef Mizrachi (https://www.youtube.com/watch?v=l2lfJNCyIF8) where he calls for people in India, Nepal, China, Japan, Vietnam & Thailand to be killed. Why; because they are idol worshippers. And this is the greatest Mitzvot for a jew. Watch the video for details. This is taken from Deutoronomy. Q: Why are Jews not following this instruction that is the greatest Mitzvot? Q: Some people have said (on Reddit) that this injunction applies to areas under Jew control (that is when they are majority). This would imply that the few Hindu temples and Bah'aai temple too in Israel are to be destroyed. Is this something practicing Jews ought to do. A couple of other people I reached out to called me out for sensationalising this - that until such an attack took place, I should not panic. My question is about the theology and belief. Thank you.

Hi, I know that marriage between jews and non-jews is prohibited and saw its source in Deuteronomy. I was however asked about whether there would be any halachic implications for a man to have relations with a non jewish woman. While I imagine that would also be frowned upon, I realized I'm not 100% sure of that answer nor would I know where to look for sources on that. Thank you!