I don't think those GAF posters would accept large parts of the French, German, Dutch or Swedish systems if they actually knew about them beyond "UNIVERSAL HEALTH CARES" or that they're in Yurop. Hell, they wouldn't accept most parts of the NHS.
For starters, they don't realize how many of these are paid and provided for, like in Canada, by smaller levels of government primarily with only a national set of guidelines and minimal federal funding. Or how many accept lower levels of private coverage than many U.S. states. Or what the before usage tax costs are to middle class and lower.
That's why we have to keep these dangerous Bernie nutjobs away from the polls in 2018 as much as possible.