Thing is, Trump isn't "undermining NATO", he's trying to escalate the war by calling upon member states to increase military expenditure or he says he'll let Russia have at them - which is a lie of course, someone put in power through the US political system genuinely wanting to undermine their imperialist institutions would just be replaced, like JFK was for wanting to abolish the CIA.

It makes sense to prefer the more stable and predictable party over the one that's less anti-Russia one day, then spouts some bs about Russian space nukes the next, specially when the war has more or less been working out for Russia lately under that stable party.