His father has publicly stated that anything about his playing career will not impact the career of his son, including name-checking saying that his spat with Keane would not be a hindrance towards Erling joining United if it makes sense career-wise.
Not to forget that they brought Haaland to Molde because they thought Ole was the best manager available for Erling to work under (at least at that stage of his development). Ole was there when he was breaking into notoriety and helped him with his mindset when he was struggling for goals initially. He generally has a good relationship with Ole both on his own and through his family (who played with Ole). And then it's kinda the factor that Norwegians don't very often get international fame, so whenever they do we cling to them, Ole being the most famous footballer for us from before and now the most famous manager. The prospect of our current most famous footballer (with a much higher skill ceiling than Ole had, but still has to deliver trophies etc through his career to become a bigger legend than Ole) joining up with our most famous manager in a club of United stature would further elevate both of them in Norway. And I know many will say that doesn't matter, but it kinda does to Norwegians, so while I don't by any stretch suggest that factor alone will make up his mind, I do think it will be on his mind as a factor that weighs favorably if the offers from all the clubs are similar.
I do think we can offer him comparable salary to other clubs, and being associated with the brand of United will help his personal brand grow internationally more to people who aren't as hardcore football fans as well.
And maybe I'm naive, but I think we are very close to being regular contenders for all the trophies again, and I also do think Haaland is the kind of person who feels motivated by being the final puzzle piece that really elevates the club back to former heights.