None of these are unpopular takes other than the first one. It's no one's business who you fuck. We have no fault divorce for those who want out for any reason. The state doesn't care about why you divorce, and it seems like many successful people have multiple families so it also seems like it wouldn't be too difficult to trip past that either.
Edit: the climate change one is also unpopular since all that will happen is the loss of diversity and people who live near the shore will have to move inland. There will be more extreme weather events but it's not like we're going to turn into Venus. Things are just going to get more expensive and classist and racist.
I don't know about sexist but I imagine they always had the defect in their brain that causes them to be inconsiderate and difficult