The push feed action may have been responsible for the jamming of the rifle, from which the guide was responsible for short stroking the action, but the bear didn't maul the guide because he had a push feed rifle.
The guide made a few mistakes which he admitted too. He's a very experienced guide and he let his guard down, made a few decisions that he knew he shouldn't have and paid the cost.
I do believe that a CRF actioned rifle makes a better dangerous game rifle than a push feed rifle, but I'm not sure if in this instance he would have had time to clear his mistake from a CRF rifle or not. If he would have had time to work the bolt again, he may have gotten another shot off. With his push feed rifle, he didn't have that opportunity. My guess is that he would not have had time to recycle the action though.