Yikes I feel like I opened a can of worms by posting this, I can assure you Hawkins was not jealous of Jin in any way, if you met the guy you would totally understand, he is a very humble low key individual.
I think that what is more likely at play is an old school Chinese respect issue, Hawkins was very progressive with his teaching and method, but he still definitely had that old school Hong Kong mentality.
Still I do not know the whole story, I am just sharing what I heard a year ago.