I'm not one to shy away from criticizing Trump when he does something worth criticizing, but I think left-leaning people would attack Trump regardless of his position. If Trump "was tough on Putin" and didn't want to negotiate a peace deal with Russia, then he would be called a warmonger. If he tries to create an atmosphere for a peace deal, then "he's a Russian asset". There is plenty to go after him about (his personal position on abortion, nothing burger from the Epstein files releases the other day, etc...), but I don't think trying to put an end to the war is one of them.