Just because they grew crops doesn't mean they quit hunting. Its not an either/ or situation.
And so what random genetic mutation occurred and how did it manifest? The gene for hunting AND farming behavior?
See, the problem with evolutionists is that their theory demands brutal rationality (ie, survival of the fittest), but when you point out the stark reality of a particular change -- like settling down to farm, losing body hair, inability of humans to smell or hear well, or even the dilution of a creature's genes through sexual reproduction -- there is always an exception or "possibility" thrown up to save the theory.
This is smoke and mirrors, nothing more. It comes down to a persistence to deny the existence of God and postulate that life "sprang" into existence. Not buying it.