My dad has become a smarmy coward as well, having spent all of the past year in local news comment sections, and reddit; seldom leaving his house (my mom does the shopping and pretty much everything). Your dad and my dad would get on well, it sounds like.
Yeah, there's a preponderance of evidence, that they've made 0 effort to review. The only difference is, cable news doesn't unanimously support flat earthers, and most of these people I'm referring to are lazy and fucking stupid and/or Canadian. I'm doing my best to be vocal regarding what evidence is on the table, in person, when people make insinuations; I've literally had a leftist at my work start breathing heavily and shaking upon a response to his spurious claim.
They aren't, though. Many of them apply zero empiricism to any methods of thinking. They're dogmatic, and anti science; especially in discourse, wherein they mock and insult. Additionally, even though they're mostly infirm faggots, they're quick it instigate violence.
I know that my dad occupies this demographic. He'll watch Colbert quote-mine 2 to 4 minutes of a 45-60 minute Trump Rally, fabricate context, and insinuate everything each viewer should think and feel about it. He'll get shitty and mouthy about it, too. My sister hates the guy, and my mother can't stand him. He's beyond any reach, even on the most basic levels. He's really not so different from any leftist I've met. It's tragically formulaic.
I was about to say, there's literally video that demonstrates the opposite to what this plump little faggot is asserting.