No yelling?
It isn't "testy" with my 'uns unless there's yelling. It's, like, normal.
My Mother keeps insisting corporations don't pay their fair share of taxes. We've been over the same ground on this about ten times; the middle several involved yelling. Now, I just sigh and say "what did I tell you last time?"
Some people, especially observable in older people, once they get something in their heads -- that's it.