Why are threads about the Ukraine tragedy getting locked?

It's because political discussions are against the chess.com terms of service.
The mods can keep locking the threads, but I suspect people will keep creating new threads, haha...

It would be good to have a space where we can express support without it getting political or insulting

It would be good to have a space where we can express support without it getting political or insulting
There are private clubs such as https://www.chess.com/club/open-discussion where you can discuss these topics.