You aren't that naive, Nato expansion for the US was never ever about bringing peace it was about applying pressure on Russia. For the countries wanting it then sure they may have wanted the security blanket, but for the US not a chance it was about democracy or protecting countries.
You think this all ends now that the US/UK don't do absolutely everything they can to try to destabilise and disintegrate Russia?
You obviously haven't met many neocons then
I firmly believe this war is nothing but a huge land grab . Putin and his cohorts have a vision of restoring the old USSR.
If it was allowed to go ahead without Ukraine getting help to defend itself there would be nothing to stop him taking all the other surrounding countries that have chose independence , hence why they want the security of NATO's umbrella.
He wants to be the all encompassing Super power of bygone days.
I don't much do politics, but I know what a despot is when I see one , he wants to go down in history as the Great ruler of a huge empire. Any opposition is squashed by whatever means and rules by fear.
He could stop this carnage including the Russian citizens he uses as cannon fodder for further advances into Ukraine.
It an utterly criminal waste of human life.
Again , he could end this ....Instantly.