Honestly I think that isn’t an issue with any one platform so much as it is one of the biggest successes of the extreme right. By being obnoxiously loud, openly self contradictory and everywhere in the media the extreme right has succesfully portrayed themselves as being representative of the entire right wing. This leaves the moderate right isolated, less likely to co-operate with the centre or left on issues where they might agree, and more likely to embrace the extreme right.

TLDR: Firehose of falsehood works even better when it splashes on the guy next to you.