If I am reading these comments on James Perez's Facebook page correctly, Perez didn't have permission to vandalize the work by Uriel Landeros which he displayed. (You can see examples of the work here. And some background here, here and here.) And now Landeros seems to be mad at him.
Perez announces the fact here:
Later on, Landeros responds.
It's hard to know what's going on here. Not everything is as it seems on the surface. I don't even know if this is the real Uriel Landeros responding (there has been at least one fake Landeros on Facebook already), or if this "conflict" is even real or if it's just a charade to keep people interested. If that's the case, it's working because look at me writing this stupid post about Uriel Landeros and James Perez. Again.