On the catalyst website it says personal cameras are okay would they consider a canon rebel t6 a personal camera? I really want to take my camera to a concert but don’t want to get it rejected and I’ve tried contacting the catalyst but they won’t r

No. Sounds like a professional camera. Go somewhere else that doesn't mind cameras.

I wouldnt risk it if I were you, unless you have a safe easily accessible place to put the camera should they turn you away. And definitely do not try and reason with them, that can get ugly quick at the catalyst. Just get there early and expect to be turned away.