You're reading too much into this.
The layoff coverage that is happening is common amongst all mergers, so every company that goes through this makes the news. Whether it would have been Comcast or some other company that bought Fox instead, it would have made big news once the layoffs started happening. Again this about a larger story which is the changing landscape in traditional Hollywood to compete against the streaming services like Netflix. It would have been a big story no matter what.
Also I'm not sure where you got information about Marvel fans being wholely against the rights coming back to Marvel. In fact all I've seen were praises for Marvel getting the rights back. In fact once Iger confirmed the continued rated R Marvel films like Deadpool I think that calmed any fears there might have been. Maybe there is some fringe element of the Marvel fandom out on reddit or twitter or some tuber blasting it in their vlogs. But overall its been widely heralded by Marvel fans as a positive move for the Fox/Marvel properties especially given some of the recent missteps with properties like Fantastic Four.