Yes, Putin must be stopped. I'm not saying he shouldn't. And let's imagine Putin was stopped, ask yourself, would stopping Putin contribute to stopping a war between the USA and China, a conflict with likely far worse consequences for the entire planet?
That's the point.
I'm all for stopping Putin. But unless you also recognize that the root cause is a insatiable craving for power, which leads to constant war, this conflict will be followed by another, and another and another.