Earlier quoted context omitted.
See https://www.youtube.com/watch?v=iljhDaowoLc , in which Fox News calls him an "evil, evil man", for making children grow up with self esteem.
This folds into the general class of calls-to-inaction which they use to pass off systemic problems. "Why are millenials poor and expecting more? Perhaps they were raised wrong by TV. Let's not examine it further." I personally didn't see shots at Mr Rogers get much further than this weak Fox segment among conservatives, for what it's worth.
At what point do Americans stand up for a bare minimum level of journalism?
And remember, that while Fox might not have gotten far with this particular piece in your experience, they sent this six minute piece out to millions of people. They wrote it, filmed it, and aired it. They never apologised.