I remember hearing something about a letter from chruchill or one of his cabinet that said something along these lines but is it true?
I have no idea wwhat to google in this circumstance so i am asking you guys.
Are you referring to the support on the part of Chamberlain and others that was implied through the policy of appeasement during the ramp-up to WWII? For it is hard to argue against. Inaction implied support, regardless of intention. Or are you asking whether or not the Weimar Republic was supported internationally? That I don't know.
Certainly conditions created in Germany by the Treaty of Versailles helped pave the way for something like what ultimately happened in there. So in a sense the allied powers helped make it possible, but the intent of some was to cripple Germany, not encourage a move toward fascism. The problem is that it wasn't wholly effective. It left Germany with enough power while still providing ammo to those who would paint Germany as a victim.
The Germans had no significant power on their east or west save France. They lost industry in territory they have up but still had the gains from Russia that Brest-Litovsk gave them. So while there were significant economic ramifications they weren't as destitute as intended.
There's an excellent book called "Origins of World War II" that goes into post-war WWI and how it set the stage for WWII and details some of what you ask.
The UK didn't so much support fascism but they tolerated it, partly due to a crippled economy after the Wall Street Crash in 1929 and also the fact Communism was spreading throughout Russia. Chamberlain saw Hitler and his Nazi party as a necessary evil due to Germany's geographical location between the UK and the USSR which would help stop Communism spreading to the UK.
This is also one of the reasons Chamberlain appeased Hitler by letting him remilitarize the Rhineland and annex Austria and Czechoslovakia, with the belief that a strong Germany would stop Communism from spreading and causing chaos in their respective countries.
I'm pretty sure this answers your question for the most part, I don't think the US cared about Germany or any of the European affairs due to their policy of isolation after the first World War, hence why I didn't really talk about them.