Why bother, because we all have to live together. Right now I believe the left smells blood in the water. They anticipate, and I think correctly, that they are about to achieve a resounding repudiation of Trump and his policies. They see power returning to their hands. They intend, this time to rule, and to rule decisively. That rule will mean imposing their agenda and tamping down all things and folks opposed. They have lost tolerance for those who think differently, frustrated by their lack of ability to communicate with the right and to sway them. I understand this. When reason and facts seem to hold no sway debate is frustrating. The thing is, one cannot live comfortably for long suppressing (read oppressing) one's neighbors and fellow citizens. This leads to fractious and contentious behavior and the pendulum then swings. Power wielded too commandingly always brings fosters and emboldens opposition.
I think dialog is essential. Sure, comes a time when legislative action must be taken when one is in power, but that action with dialog, even failed dialog seems like statesmanship, without it, it seems like oppression.
Maurile has the correct take, in my estimation. Speak to issues, not sweeping generalizations, explain yourself with patience and understanding, and without denigrating the opposing side. Find what commonalities one can, even if they are small and try to build on them.
For instance, on gun control, acknowledge that both sides are concerned for their safety. Acknowledge that both sides are seeking security for themselves and their families. Stop with the dialog crushing insults one to the other and accept and embrace concessions, even if they are not the concessions you seek, as maybe one concession begets another.
Oh, finally, don't accept the idea that trolls are representative of the opposing faction. learn to marginalize the flamethrowers by ignoring them and still engaging the larger majority who are reasonable even if that has been forgotten in the shear volume trolls seem to produce. Damn trolls are indefatigable.