More seriously, there's ways to deflate the heat.

1) avoid use of language like liar or flat out wrong - the first goes to Intent more than correctness, the second is as hyperbolic as the million wrong things which motivated it.

2) I beseech you, consider but you are wrong: appeal to their better nature, posit the alternative view.

2a) be prepared to acknowledge you may also be wrong

3) Hanlon's razor

4) Some people are just dicks but you don't have to feed it.

5) remember English is a federated language and to a welchman a faggot is just a tasty meatball wrapped in caul-fat. Sometimes what people write is confused or confusing and it can be reader or sender miscommunication or.. both.

6) thomism: do not attempt to rebut or convert. State your view and restate it. Sometimes works but can be infuriating.