I was taught that in evangelical Bible studies/camps as a teenager. Part of their reinforcement methods for some kids is to send them to philosophical crash courses on how to debate against other religions, and in particular atheism and humanism since they are on the rise in the US. It's not a bad idea if you actually want kids to explore the ideas and fundamentals of your religion and morals, but the problem for them is that the smarter ones that do more research will go read the counter arguments and learn how shakey that foundation actually is.
I remember at the one I attended a few times was called Worldview Academy, which was an evangelical Christian fundamentalist camp. One of the counter arguments they would trot out every year was that "humans are flawed, and cannot come up with a moral code on their own, so it's required that you obtain your morals from an external/non-human source." And then they go Ah HA! THE BIBLE IS THE ANSWER! You can see how that fails to hold up under scrutiny from a number of ways, but this was what they drilled into kids heads. They would say, "Atheists claim there are no absolutes... but that itself is an absolute!!!" And then laugh at how they have just unraveled the entirety of atheism's core belief structure. At the end of the week, they would have some straw man atheist (played by one of the camp teachers) who would come and "debate" the class who would ask questions about his beliefs. He would, of course, fall into the philosophical traps that they taught you about at the camp. It was basically trying to set up gotcha moments, but only if you didn't bother looking at any other information beyond what they spoonfed you.
I remember the Islam section focused on the person that Muhammad was, and had the claim about him marrying a 9 year old girl, which of course invalidates him as a moral person. This of course, completely ignores all the immoral things that heroes of the Bible did that can be found directly in THE BIBLE. But you know, that doesn't count, because... reasons.
Anyways, a lot of this sort of stuff I learned in the late 90s before the Internet and Youtube were a thing has now been outsourced to people like Ben Shapiro, Crowder and other talk show/podcast guys who can reach a large audience. They go into much more political discussion, reinforce it with "smackdown" type videos, and radicalize these kids to their belief system, and those 20 people in that video are the result of it. Completely lost in an echo chamber of their own beliefs, unable to listen to a single person discussing a different view, and just simply restating their own beliefs over and over and over as if that makes their arguments valid.
Like a black guy arguing that DEI is bad, but cannot understand a person plainly explaining the difference between non-discrimination hiring practices (good) and racial quotas (bad).
Or a gay guy arguing that trans people can't be in the military, because they might have medicines that might require refrigeration.
Or a white woman arguing that there should be a "dominant culture" that everyone who "comes here" should assimilate to, instead of keeping their own beliefs, language and customs. (she also said Trump wasn't conservative enough because he didn't cancel all the H1B Visa holders and send them back)
They have gone off the edge, and the only thing that will possibly change it is a massive disruption to their current lifestyle or someone close to them.