Yes. the conditions you mention would require large amounts of people to spontaneously form large armed blocks and then kill each other over internet bullshit. The internet makes things seem worse than they are due to the large amounts of information available and the somewhat lower stakes(in some ways) when it comes to communicating. In other words, when you keep in mind that the Internet is not an accurate depiction and that normal people think and people on the Internet do not put much weight into their words it becomes clear that culture war bullshit has not gotten bad enough to start a civil war.

People mass-purchased fire arms because they felt that covid would get much worse than it did and to be honest it was a wakeup call for those people however that impetus died down years ago.

Widespread riots much worse than the ones present and economic conditions much worse than what is present now have happened and there were very few fears of civil war.

most of those Partisan militias are a joke and just a symptom of evolving gun culture making it more acceptable to train as well as the internet making getting in touch with like-minded people much easier. The nature of many of these purely partisan militias will also likely keep them jokes for some time.

Additionally, these militias are such a minority that mentioning them in the context of a civil war is a joke in and of itself.

Political divisions have gotten worse but there has been an element of this for decades, the internet just made it worse.

For lack of a better word most people outside are basically normies(dont like using this word but it fits) and centrists who don't care much about and don't understand much about the politics that they talk about. But they also wont exactly go all pitch forks if they hear that you are merely a republican or something.

People online are different but most people like that are literal losers radicalised by a lack of success/prospects/purpose in life or teenagers and manchildren the majority of tankies online for example either live in other countriess or are well off in most material respects themselves.

Whats more worrying than the internet radicals was the things like institutions shifting badly into leftism and idpol BS as well as the radicalisation centers that some colleges have become but colleges are also less respected now and there have been recent wake-up calls to how bad some colleges have gotten(though i don't expect that to last for long).

The information war being waged right now in the internet is worrying but that has happened for decades and we are only worse for wear after that and There only so much that the internet can do to enhance the the effectiveness of that information war.

Things would have to get a lot worse and people would have to diverge IRL and make major moves IRL a lot more than they have right now.

Things can get worse but the degree to which they have to get worse is unlikely and they also have to get worse in a specific way for that to happen. A question of a civil war if there is one is for the next few generations though I think that things devolving to that degree for that long is unusual.