Ukraine definitely does not have a sensible leader. In 2021 he declared both that "he does not like the Minsk agreements" and that "Ukraine needs to obtain nuclear weapons". After the start of the war, he insists that Ukraine be allowed to join NATO, which would automatically mean World War.

Alright, from his point of view, perhaps this is sensible: Ukraine stands to lose otherwise, so for him the World War might be preferable.