I agree his behavior at the UN was utterly deplorable. But that's Trump, deplorable. The American people will not stand up and immediately remove Trump. We are a rule of law nation. Trump's party controls all branches of government. It's highly unlikely his party, the Republican Party, will rise up and oust Trump anytime soon if ever. Unfortunately, we will have to live with Trump. I don't expect Trump will be removed from officer before 2019 at the earliest. It's possible Mueller, may complete his investigation before then and if that happens, it's possible Trump might be removed from officer sooner. But I wouldn't count on it. I wish circumstances were not what they are, but my wishing will not change our circumstances.
I'm sure Trump's not bothered by genocide. But I doubt the US will commit genocide in North Korea. The US may well destroy the Kim regime and his military, but I doubt it would target civilians. It would be a very bad day for Kim's military and for Kim. Kim and Trump are both narcissistic kooks.