Because you're enough of a faggot as it is.
Even the right wing parties in Europe generally favour things like universal healthcare and some degree of union rights. It's just that the US is so far out of wack they consider things like Bernie (someone who is further right than most European right wing politicians) to be some crackpot commie when he really isn't.
This is an utter meme that American leftists seem to perpetuate to make their ideas seem more palatable, even though actual old school Socialist parties in the EU would find many of his ideas a bit far-fetched. You'd have to be drinking lead-based paint to think he's more right-wing than Euro right-wingers. Let's review some of his proposed policies:
-a child's idea of a wealth tax (when nearly all Euro countries have largely abandoned even their far more sensible ones, or are all planning to)
-force corporations to sell stocks to their employees until a certain percentage is met
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Double the minimum wage (even the unions here are asking for it to be raised by half at most)
-opposed austerity measures in Greece (political suicide anywhere in the EU outside of Greece)
-opposed military intervention against ISIS (unpopular even here)
-abolish tuition fees and student debt entirely (only the Nordic countries really do this)
-supports Green New Deal (excessive eco-activism has proven very divisive here)
-single-player healthcare (most euro countries actually have a mixed system, completely socializing it isn't that popular among the centre-left)
-the race and gender pandering (generally not as big a deal here)
All in all, he'd be a pretty staunchly Far Left candidate in most European countries. Quite a few of his central policies would make him more extreme than a few actual Socialist parties. I don't think there's anything wrong with supporting him, but the dude is just quite radical. Pretending that Hard Left viewpoints are the Centre won't do anyone any favours.