From my subjective and anecdotal perception as someone who interacts with people from many countries, it looks mostly like an US thing at the moment.
The problem is that most of the West tends to imitate cultural and political trends that originate in the US. And this is already being imitated. In most other countries we are not yet seeing a war to the extent we see in the US, but the American situation could be the canary in the coal mine.
My theory is that because the US has been shifting right for decades, parts of the US leftwing has to some extent resigned itself to thought policing and arguing semantics instead of fighting for actual policy changes. When you can't fix the big problems, find some small problem that you can focus on instead. If the US had a leftwing party that occasionally got in power (instead of a two-party system with a centrist and a rightwing party) then lefties would probably spend their effort on making that happen instead.
The problem is that most of the West tends to imitate cultural and political trends that originate in the US. And this is already being imitated. In most other countries we are not yet seeing a war to the extent we see in the US, but the American situation could be the canary in the coal mine.