I certainly blame Clemenceau. To his credit, Wilson, who I have few good things to say, did try to get Clemenceau to moderate the terms, but he wouldn’t listen.
Wilson showed good sense in that case.
There were also social and economic problems in Germany which made the NAZI party seem like a sane solution. Dictatorships do not arise during times of moral and economic stability. It is also not possible to convince a nation to blame an entire race or religious sect for those problems.
Hitler certainly did not invent anti-Semitism it was already underneath the surface of most European nations. He just gave Germany justification (false as it was) for bringing it to the surface.