I think the anti GMO crops position is pretty comparable to climate change denialism.
I think that to make such a statement is foolish, as GMO crops are so wide a field that you need to look at every crop alone rather than just come with blanket statement. Beside even the Green Revolutions which dealt with crops and methods we already knew, have shown itself ttoo have a lot of unforseen consequences when embraced on large scale, so the best is not to blindly jump into the unknown, but to careful look into the consequences, as when the genie is out of the bottle it's too late.