All jokes aside, it could be as simple as Hooligans on a day out knowing they'd get trouble undetected at a lower league game, they can't get it much at league level these days.
Although, I thought the whole hooligan thing was like minded people..not attacking your normal fan.
I'd guess merthyr have some.lumps that follow them, lads I've worked with from up that way that go now and again I wouldn't want to **** with, but again not your typical hooligans just lads on the piss.
Injuries sustained seem awful. Hopefully all.recover and nobody too seriously hurt or shaken up, wouldn't be nice if people were put off going to away games because of something as silly as that.