No. Like you say, riots, and of course the ongoing epidemic of stochastic terrorism, possibly with more violence directed against politicians and the government, but it’s definitely not going to look like tanks shooting at tanks, and it’s also not going to look like people crawling through tunnels a la Vietnam. What American simultaneously cares enough about politics to risk their life over it, while also being willing to go live in a trench without their phone for a month? No, as long as it’s an option to live a normal life where you can return to your couch and watch or read the news while feeling righteously indignant and engage with social media however you like, that’s what people will do. Look at the January 6’ers, for example, who fully expected to return home and be able to post all about the exciting event all over social media.

Now, that all goes out the window if some lunatic decides to start WWIII with China and institutes a draft (assuming we don’t all just die in nuclear hellfire). You tell people they’ll have to give up their phones and go live in a trench anyway and maybe some decide they’d rather fight the people making them do that. Americans generally love war, but a lot of that comes from being completely and totally separated from any real life consequences from it. And of course, no insurgency would stand any chance of defeating the US government without foreign support.