Sanders isn't exactly a socialist, but It's worth mentioning when Fox hosted Bernie's town hall he was received very positively.
The meme suggests that the problem is these dumb dumb Fox viewers that I'm definitely better than and that makes me feel good about myself without actually having to do anything hard. A better critique is that all corporate media (not just Fox & the like) continuously and severely distort the concept of socialism to their viewers, which causes them to be mislead.