Does having a different opinion about the M-14 mean he's biased? He thinks the M-14 was not the right weapon for the type of fighting that was going on in Vietnam. I think his biggest beef was with the Ordnance Corps and how they developed weapons.
He was biased against a lot of things. The only reason the FAL was the “right arm” of the free world was politics. It fires the same round. I’ve got extensive experience will a multitude of small arms, and the M-14 hands down is top notch.
He was factually incorrect in a lot of things, but I do like the AR-10 as well.