Straight from the horse's mouth:
Seems like the two drivers didn't agree about the reason for the crash (...shocking), but that Nico did hold his line, risking a collision, in order to "make a point". Hope that clears up some of the confusion.
link.
Toto Wolff said:"Nico felt he needed to hold his line,” Wolff said. “He needed to make a point"
...
"We had a collision that could have been avoided, a second-lap collision, it was Nico who attacked and he shouldn't have done it. It was also to show he was not prepared to give in. With hindsight, if he could turn back time, Nico would probably not do it again in the way he did."
Seems like the two drivers didn't agree about the reason for the crash (...shocking), but that Nico did hold his line, risking a collision, in order to "make a point". Hope that clears up some of the confusion.
link.