It's not just fear. Some people really do believe that certain behaviors are abhorrent.
I think there is danger both in incorrectly identifying what behaviors are socially and individually destructive and in abusing power when people behave in an "unacceptable" manner.
Basically - society will suffer if it accepts things that shouldn't be accepted (either in what is accepted without "punishment" or if excessive punishment is accepted) and if it doesn't accept things that should be accepted.
There's also a massive shift in the concepts of individual vs. collective "acceptable" behaviors. Basically the whole needs of the many vs. the needs of the few, or the needs of the present against the needs of the future types of arguments.
Therein lies the problem: the two parties fundamentally disagree on what’s acceptable and what isn’t, so when one gains control of the reins, the other excoriates them as the bearers of chaos and destruction that will bring about Armageddon, which basically means that “anything goes” so far as politicking.
Which is sad because the Republicans are much better at doing that than the Democrats.