I think these are from JD Delay, a dude who left prison and got famous on YouTube talking about prison politics and reacting to general bullshit.
Some of it comes from people who were abused when they were kids. Others just love to talk about killing pedos.
Yeah pedos are terrible, but it sort of seems like guys with shirts like this just want to hurt someone, and pedos are a convenient target that won't be protected.
Not sure I understand the question. Dude in the hoodie thinks wearing a shirt about killing someone makes him look tough. He's not identifying as a pedo... except maybe accidentally in a "thou doth protest too much" sort of way.
Under his hood. That's why it's a funny picture. He thinks he looks tough saying to "kill your local pedophile". To everyone behind him, he seems to be calling himself a pedophile.