I’ve seen several articles about protests against tourists in Spain. I didn’t bother to read the articles, but I think it’s about housing prices being driven up because of air bnb. So maybe stay in a hotel if you go there?

Sure. Anyone with nukes could give them to anyone else, but what happens after? If someone gave Iran nukes, then what’s to stop the US or France or somebody giving nukes to Ukraine or Taiwan. Ultimately it’s too big a risk. Even if two countries are close allies now doesn’t mean they will always be, and the nukes can’t be taken back once given.