>teenagers became young adults and started paying attention to the world around them.
4chan in the 2000s was a place that nerdy kids gathered and it was an American site, using english language. Most nerds are white. When you are a nerd, you don't care that much about social approval (thus being anime fans with waifus) and you care more about what is true and what is false.
And wouldn't you know it, while it is unpopular to say niggers are dumb and violent and kikes are greedy liars, it is the truth.
And here we are.
Based.