The rest of the world turned right as well. In actuality, the entire world had a bad four years and voted out whoever was in power, regardless of the reasons or outcome. Also the US left ran an extremely bad candidate and they still had a strong showing; a real candidate might have pulled it off. We can only speculate though.
Well the rest of the world may have turned right, but their government did not threaten to invade less powerful allies (among many other threats) while staying really popular, did they?
Can you show me leaders of countries in the rest of the world who have been making nazi salutes while staying really popular, too?
Do you know that far right leaders from other countries have refused to appear next to far right leaders from the US after nazi salutes, because it seemed a bit too extreme to them?
however they saw what happened (including the events of Jan 6th), and they did it again
so it's not a one-off, it's a pattern
the rest of the west would be foolish to treat this as anything other than a permanent new direction