They may have been confused but in the end she is exactly right. All the bs about Zimmerman getting out of the car had no bearing on his right to defend his life from a brutal attack. And that will never change.
from what GZ said it wasn’t so much the attack as that he thought Martin was going for the gun. that was the real linchpin. If Martin had just got up and walked away or even just kept punching him he may not have shot him. it was when he said “you’re gonna die tonight” and coupled that with going for the gun that led to the shooting.