I'm still amazed that SASLess and Co seem to be saying we should go to war over Ukraine
Can't speak for them, but I'm sure no one is saying go to war with Russia, just be prepared to. He's a classic bully, until he knows there's a cost he doesn't want to pay he will keep bullying.
I'd be fairly sure just planting a few troops one ship and a couple of aircraft in harms way would call his bluff.