Of course it isn't just him, he's just the most visible and powerful such example.

When the media constantly focuses on him as the target, it starts to feel as though they don't really care about the story they're pushing, they only want you to notice how many of these bad things are associated with Trump. It seems dishonest. Personally, I think a better example would have been the wage gap myth; the author could have even noted that Obama was guilty of promoting it. (Disclaimer: I voted for Obama and I did not vote for Trump).

Trump is certainly the example that's repeated again and again, and there's no doubt that does seem to have convinced a lot of people.