of course Ernst Röhm sort of died in the night of the long knives. As with most sociopaths A.H. would use any one and dispose of any one as he needed/wanted.
Your description was a bit scary.. sort of Hetalia in real life (and NO I do not like Hetalia )
Rohm was pretty much a Communist. He advocated Nationalization of all German industry and executing the Industrialists.
Hitler was actually a fairly pragmatic man at that point....He understood he needed the industrialists to build his war machine, and they would not support Hitler until folks like Rohm were out of the picture. Also the Wehrmacht would not support Hitler, until Rohm, who advocated replacing the Military with the SA, was gone.
It wasn’t personal, it was strictly business.