what people do you mean - ie inside the RF? Do you think it started there and the RF or the RF machine stirred up the press with negative stories about H&M deliberately?
Also leaving the racism issue aside. Yes, I do believe this. Reading between the lines it's difficult to come to any other conclusion. Someone very close to the inside of that dynamic was leaking like a basket, at one stage on an almost daily basis. The stories were practically all to Meghan's detriment. Even allowing for the fact that Harry isn't the sharpest, no one in their right senses would efficiently stage-manage media smear campaign against themselves, calculated to show them up in the worst light possible. This just would not happen.
Rebekah Vardy isn't the brightest, either, but her case highlights how these campaigns of leaking operate, and what's involved in these mutually beneficial dynamics set up between individuals and the media, no doubt in return for glowing coverage of themselves. It's not unfeasible that this is what's happened here. The reason Markle is so widely loathed, IMO, is that few stand a chance against such a slick PR machine as the Windsors'. Their advisors, if not themselves, are not as dim as Vardy.
I can’t see how the RF as individuals and family - siblings / father / grandmother would benefit from doing this?
There are several ways. A schism had opened up within the family and someone, for whatever reason, believed Harry and Meghan needed putting back into their box. The reasons are a matter of speculation: all we can see is what was going in the media. Certain family members were receiving a poor press for laziness. Meghan, unlike most Windsors including her husband, is smart and articulate. The DM venerated the Cambridges to such an extent that their readers started sarcastically referring to her as Saint Kate. Rumour was rife in the overseas media that William was in the throes of an affair with his Norfolk neighbour. (Immediately, a counter-rumour went around that someone admitted the story was made-up. They didn't. They merely said they had no real evidence it was going on - a different thing entirely). Then, of course, there was Andrew. His misdemeanors are far graver, but he hasn't been subject to the same censure.
Another day, another article on Horrid Harry and Mean Meghan. What better decoy for preserving the rest of that family's image?