Blocking a defensive player on the ground

[pernajj1]

We have a situation where A4 is an offensive tackle blocking B60 in the box. B60 falls forward to the ground and A4 uses his hands to keep B60 on the ground but does not fall on B60.

B60 becomes angry and as he rises up after the pass is away, picks up A4 with his hands around his thighs, turns a slams A4 on his head.

No foul was called on the play for whatever reason. The act resulted in A4 having a strained neck and most likely will be out 2 - 4 weeks.

B60 was suspended 2 games. Here is the question, B60's team is actually defending him stating what A4 did somehow instigated this act of aggression by holding down B60 and not allowing him to return to his feet. In my opinion, this is appalling. Any thoughts as to how anyone else would feel about this situation?