Other countries will be scared Russia could attack them next, so of course they want some protection. Putin got away with taking some parts of Ukraine, but it seems he mis-judged how others would react to a full invasion.
The UK has been someone lacking in its reactions and the sponsoring of politicians by Russians could be seen as a reason for this. Not sure how they will talk their way out of that.
I went to Kyiv a couple of times about 10 years ago for work, so I feel some attachment to the place. Sad to see this going on. Putin needs to go.