Lets use some common sense, does it have to be spelled out for fines and suspensions. I will bet punching a ref in the face is also not mentioned, so does that mean he wouldn't be suspended.
I will be shocked if he doesn't get surprised. Add on top of that his "priors'. Maybe the NFL is so shell shocked over this entire kneeling thing they will try and jet let this go, like no broadcasting the nat anthem on TV anymore, just ignore it, that is the only way I think he is not suspended.
So are you implying him pushing the ref is not a factor at all? I think pushing a ref is 10x what coming onto the field but that is just me.