A good starting point for a decent discussion would be reviewing the

Definition of decent

1 : marked by moral integrity, kindness, and goodwill
2a : conforming to standards of propriety, good taste, or morality
b : modestly clothed
3 : free from immodesty or obscenity
4 : fairly good : adequate, satisfactory

So, for example, having a discussion without resorting to insulting others, or belittling others, or name-calling, or casting slurs on another's country, or any of your usual behaviours exhibited in your discussions.

It would also require a balanced approach to evaluating the content of a discussion and providing opinions, for and against, based on the content instead of turning it into personal attacks.

I'd like to see that.