Often I wonder which of our leaders has ever played poker. It seems like Putin has figured out that we won't push all-in, ever, so he steals another pot.
If the west really cared about this, the only way now is to retaliate way out of proportion to what's happened.
Before this happened, the west also didn't act like it wanted to contain the Russians, so the Russians got brave. If there had been some sort of response the Russians would have backed off. It's somewhat stable for both sides to bluster about this or that minor victory. Can't do that now.