>>126965962 (OP)Maybe try learning about why the 1970s was different first?
The 1970s was genuinely a very violent time. Most of the punks were just art kids who were shit scared all the time so acted out by making themselves looks like psychos to scare off all the various peoples who would want to kick their head in. It's the same reason today the girl who dyes her hair and wants to show that she doesn't care is usually the most anxious and afraid girl.
Not to mention people genuinely thought society was crumbling and punk was just a way to let out the frustration of being the generation that would see it collapse. Which it did and we live in the sanitised world remade up by corporations and the rich which is also another reason why punk cant exist anymore. Because there is no more society to rebel against (and if you don't know what that means then you REALLY have to learn how the 1970s was so different).