These days many of us just see Putin, in effect, standing at Trump's shoulder, advising him how to "alien"ate the entire world to weaken American and its military and its internal security forces. Happened when the Soviet Empire fell as well, the gangsters and billionaires looted everything that wasn't nailed down. We are, as a people, divided one from another and goodness knows our NATO allies have to know Trump won't have their back if, say, Putin insanely attacks Poland or starts to use nukes in Ukraine.
Hmmm...what was the stupidest war started during my lifetime? Born just after WWII, I think I would have to say it is a tie, Putin attacking Ukraine and my country, the US, deciding to totally engage in Vietnam. But still, Trump could decide to order boots on the ground in Iran...