This is important too.
I don't see this as some kumbaya thing where cats and dogs wind up holding hands.
There are some people who never want to unite. At least not much. And that's ok.
What
@Terminalxylem spoke of above is right. We have to be smart and make good use of our time and energy.
So I look at things in an "effort" and "benefit" matrix. How much effort is required? And what's the benefit? It's really that simple.
It's possible one might seek out the hardcore Make Libs Cry guy and try to convert him. But it would take a ton of effort. And have a low chance of success.
It's much less effort to be kind to your normal neighbor who voted Trump without fanfare.
And it's zero effort to not mock the Trump voter on a message board.
For most of the things I'm talking about, the "effort" or "cost" is swallowing your ego a little and denying yourself the juicy zinger moment where you burned the other side. (which is actually pretty empty anyways). Bottom line, it's just not that much effort.