With all due respect, if it was a clear call, I would agree.
But in all honestly, I have seen the same thing on both sides...and it is ONLY called when it matters and ONLY on the Hawks.
That is a different issue. It calls into question the solidity of the refs.
Holding happens on every play, everybody knows that. The question is did the hold EFFECT the play, and in this case the hold kept the defender from the QB allowing him to make a pass we otherwise wouldn't have, so the hold needed to be called.