[fatbird]

Don't encroach NATO on their doorstep.

Norway, a founding member of NATO, has always shared a border with Russia. Before Finland and Sweden joined NATO, they'd already developed operational compatibility with NATO going back decades. NATO encroachment was an issue only insofar as it took away local targets for Russian expansion.

Bring Russia into NATO.

Putin desired NATO membership because then, any hostilities with another NATO member would become an intra-alliance conflict that NATO couldn't deal with. When Greece and Turkey fought over Cyprus, they were both in NATO, so neither side could invoke article 5 for help. Russia in NATO wouldn't prevent Russian wars, it would neutralize NATO.