Whatever your beliefs, it's very stupid to try to have a debate in public on a politcally heated topic with someone you don't know, without some sort of moderator or an agreed-upon set of rules.
This guy is saying "I believe X" and is fighting really hard for his beliefs. Instead of addressing whether it's valid/worthy, you're insulting his intellect for standing up for what he believes in a way you consider not-savvy.
And the idiot got himself killed for it :-)
One wonders how history would've turned out if Galileo had followed your advice? https://en.wikipedia.org/wiki/Galileo_affair