I suspect that you are confusing a "statement of fact" with an "unsupported claim" and/or "statement of feeling."
If such people would restrict themselves to making true "statements of fact" - i.e., that are falsifiable - whereupon you could then proffer corresponding counter-evidence, then a productive discussion could ensue.
But they don't do that.
Regards,
Oh, no, not even talking politics! I try to stay away from politics with certain people with whom I would like to maintain friendly relations :)