Churchill claimed that he had said no such thing, and was sued for libel over it: https://www.winstonchurchill.org/publications/finest-hour/fi...
After the publisher was indicted for sedition, the judge dismissed the case.
It sounds to me absolutely nothing like something he would have said.
In school we learned that it was England and France who pushed for the punitive version of the Treaty of Versailles, but I guess this could be my American textbooks whitewashing the world.
The people might have been different, but I don't see how an indecisive WWI prevents another border skirmish from getting out of hand 20 years later. Maybe it would have been better for the Jews, but even that's iffy given the generally hostile attitudes of continental Europeans to Jews and Gypsies.
A negotiated peace in the west would probably have also repealed the horrible peace in the east. The Germans defeated Russia completely enough that they could get whatever it occurred to them to demand; the resulting treaty was almost as hard on the defeated as Versailles, even though Germany wasn't actively out to destroy Russia, and it certainly didn't help the Whites in the civil war.
-Winston Churchill