All of what you say doesnt preclude Rakim from bein jealous of Nas.
When Nas was emerging, he was favorably compared to Ra with the commentary almost reading like: "Hey everyone, there is a younger, more gifted, more talented, and better looking version of Rakim named Nas. Check him out!". Rakim had to feel some type of way...Its human nature.
Ra has a career to be proud of, but Nas has had eight of his albums go platinum and he's still very relevant today with high profile guest appearances, commercials, lucrative concert tours, and overall in the eyes of critics and fans is generally recognized as the best to ever do it. Im sure he looks at Nas and thinks that's the career he should have had and deserved. Just by virtue of being a competitor at the very least.
Jay was never compared to Ra because they were two different animals as MC's and people, but Nas was (a cerebral poet; lets his music speak for itself) and subjectively (better rapper) and objectively (far wealthier) he surpassed him. Reading between the lines on why he's been reluctant to embrace Nas over all these years...welp, like a certain someone said: 'It aint hard to tell'.
