Originally Posted by BttF_LttP
What I'm saying is that it shows that just because one McFly learns to stand up for himself, does not mean that his son does. So, Marty standing up to Needles has no effect on Marty Jr.'s relationship with Griff.
True enough. Still I feel that since Marty, in the Eastwood timeline, has seen what his son ended up being in Lone Pine 2015, may well make efforts to ensure he turns out differently, and stands up to Griff. If he had the will to change his own future, you can be damned sure he will at least try to change his son's!