Most people don't want to get harassed and attacked at the level Trump gets so there are strong incentives to not do what he did. Saying there are no reasons not to do it is just ignorant, most people prefer peace and quiet over drama.

Joining the crowd to express approval for extremism (or equally extreme disapproval) has a much lower bar than making the "top-level" statements you refer to, though. Inflammatory content is constantly rewarded with a firehose of such "engagement", and it's coming from the vast populace that's supposedly averse to drama.

Suppose there is an arsonist setting fire to random houses. They come by and throw a Molotov cocktail through your window.

We then observe that you immediately drop everything to deal with the fire. Should the conclusion be that you love arson and enjoy spending time on it? More importantly, do we like a system where the arsonist is rewarded for getting you to spend time on something?

Are you making an analogy of having a moral obligation to engage in a flame war online?

Suppose this is inherent in human nature:

https://xkcd.com/386/

Now decide if you would like something that works differently than Facebook to replace it.

I can’t tell you much I recommend getting off social media.

I post here, and sometimes in a dynasty football reddit.

You’ll realize how evil the whole thing is.