I think the reason Victoria pushed for publicity as a devoted mother and wife was in response to David's philandering ways. She was trying to protect their brand and the children sadly were the best way to try and convince the world they had a happy marriage and it was all vicious lies. As a consequence she actually became very unlikeable to the public for a long time, as we could all see how disingenuous this narrative was and we would in fact have been far more supportive of VB if she had been honest about how hard it had been to get through the cheating and rebuild their marriage alongside their careers at the time.
I suspect David's affairs is the real reason Brooklyn is so obsessed with prioritising his wife and demonstrating his commitment to his marriage, and the issues with his parents have been bubbling in the background for years because he can't possibly respect his dad for cheating.
The unfortunate thing is his chosen wife appears hugely insecure and jealous, and so whilst she leverages the beckham brand she can't stand Victoria having a bigger public profile than her or the fact Brooklyn was a total mummy's boy when she met him. I think she probably pushed the narrative that David and Victoria's marriage is built on lies and cheating and has encouraged Brooklyn to distance himself as they are not like that and show the world he would never treat his wife so disrespectfully.
But I think maybe that is a convenient excuse for Nicola to drag him away from the whole beckham family and his life before her, as a good wife would have encouraged him to work through these issues with his parents and siblings rather than fighting with them.. Not wearing a VB dress amongst her many outfit changes on her wedding day was hugely disrespectful to her mother in law and very cruel. It basically said her brand isn't good enough for a billionaire like me! I'm sure they could have tried harder to come to agreement on a suitable design but she didn't want the press to focus on Victoria's beautiful wedding dress and fashion brand, rather than on her. She knew there would be more headlines about Victoria and David on he wedding day than her and could not stand the thought of sharing the day with them.
I think when Marc Anthony sang at the wedding and called Victoria the most beautiful woman in the room (assuming that actually happened!), it was innocently done and came from a good place as he is very close friends with the beckham's. Nicola's subsequent tantrum shows what a spoilt princess she is. I don't believe for one second that Victoria orchestrated any of the first dance nonsense, but clearly Nicola wanted a redo of the marriage to not include her mother in law as she remains threatened by her and is cruelly and publicly pushing Brooklyn's family out of their lives.
I think issues with in laws are not uncommon and I think there is probably fault here on both sides. Family wounds from childhood haunt us all and Brooklyn has been badly guided and seems to lack any intelligence on how to work through them. He has also married a very difficult woman who has done everything to destroy his relationship with his family. it's totally bonkers that he now no longer speaks to his brothers and sister, grandparents or childhood friends.. he will regret this and I doubt they can ever fully resolve this now.