You're may be right. I assume most of them are 'useful idiots'.
They realised western media were often biased, so they switched to 'critical' media, spent more and more time in internet bubbles, and ended up uncritically parroting Russian, Chinese or Iranian propaganda instead.
Same thing happened after 9/11 and Iraq. A lot of people were angry about how biased CNN was, so they switched to channels like Russia Today because it was critical of the US and did genuinely have a lot of good journalism. Of course, that doesn't mean Russia Today isn't propaganda. A lot of these people are forever lost, I don't think you can deprogram them.
Also if people use a lot of slogans like "cultural marxism", "Fuck Brandon" or "genocide Joe", without being able to articulate a nuanced position, it's likely they've succumb to newspeak. Newspeak uses an impoverished and simplified vocabulary, to prevent people from critical thinking.
I mean, Biden absolutely is wishy washy.
But he also reversed Trump's policy of saying West Bank settlement is legal, and sanctioned violent Israeli settlers.
Obviously Gaza's really bad, but what's happened and happening in the West Bank is also arguably ethnic cleansing. Chasing Palestinians off their land. Trump's a fan.