Where does the stereotype of us drinking warm beer come from?!

Contrary to the previous wrong answers..definitively, the idea that we drink warm beer, was developed by the US GI`s when they were billeted in U.K.during the last Skirmish with the Hun, they were, and still are, used to drinking insipid, tasteless, ice cold Bud (as it was then, it is still now) and U.K. Real Ale or Draught Beer, as opposed to draft beer, is served at cellar Temperature 12 deg Celcius or 52 F....because U.K. real ale is a live beer, if you chill it down too far, it goes cloudy and becomes tasteless, but if it warms up as you drink it it does not spoil, where as Ice-cold U.S. beer when it warms, begins to taste like it has been strained through a Sumo wrestlers Jock strap..or worse....

Quite simple

Most American beer is that disgusting they have to take it down to near freezing to hide what little taste it has.

Most "proper" UK beer has taste,so can be drunk at the optimal temperature for that taste to be enjoyed (12 - 14C).

Americans have this weird theory that everything they do is correct, therefore we must be drinking our beer too warm - when in fact the reverse is true and they drink theirs too cold.

Ale was kept in kegs aboard ship, too, along with rum (watered down, called grog). No way to chill it while you were at sea, so it was warm beer or no beer. I'm not really sure when beer began to be chilled but for years it was served at ambient tempatures.

Don't know. I've heard Germany & other countries drink warm beer. In Australia we wouldn't dream of it.

thats a general term, many beers are served cool or room temp but never warm
american beers need to be ice cold, so anything else seems warm to americans