Obviously if Putin wasn't looking to take Ukraine all would be well.

Since he is, it is different than Crimea no? Do people in Ukraine want to be a part of Russia?

It kind of seems like people are saying "Yeah we see Russia will invade Ukraine, oh well, let them deal with it. If anything let Europe handle it."

It seems like things would escalate and we would end up getting involved later anyway. What is the best case of US and Europe just ignoring it and letting Putin do as he pleases?

To be clear, I am anti-war. I just don't know what could be done differently from the US side.