It's not hate! It's merely saying that a guy who had just two good seasons as a Met and played 3/4 of his career elsewhere falls short of qualifying for what should be the club's ultimate honor of number retirement.
AND ... it's an argument against having his #8 stuck in this nether world where the number is neither retired nor in circulation.
Also, I think your question, Coobs, can be part of the problem as well. Too often, these days, it seems an argument against someone having a number retired or for Not inducting one into the Hall of Fame gets painted as if it is hate, or at least disrespect. No, it's just a value judgement.