I agree with your assessment of the article (in terms of what it was trying to express), and I agree that what you have described does occur on the Internet. B

I agree with your assessment of the article (in terms of what it was trying to express), and I agree that what you have described does occur on the Internet. But I disagree that this phenomenon that you (and the article writer) have described, is known as "cringe". When people talk about "cringeposting" or saying "that was so cringe", they mean the vicarious embarrassment, the feeling you get when you feel so bad for somebody that it's almost funny, when you realise that somebody is being a try-hard, and doesn't know how badly they're failing, etc. What you have described is just commonly known as "stereotyping". People do it all the time in real life, and all the time online. Person x spouts an opinion that people in group y think everybody in group x has. That isn't cringe. Everybody has biases and stereotypes. If I see somebody from x political group saying something I've heard 1000x before, my first thought would probably be "here goes x grouper again". I would't think they are cringeposting or that they are a cringey, just that they are another classic example of some stereotype that I have developed over many years of reading articles, posts and comments by people like that.