Ex-NBA coach George Karl says more than 100 hoops fans want to see him 6 feet under ... revealing he's been on the receiving end of death wishes for bashing Carmelo Anthony on Twitter.
Karl coached Melo on the Nuggets from 2005-2011 ... and while Denver made the playoffs for most of their time together, the two never really got along.
Of course, 70-year-old Karl hasn't held back when criticizing Melo in the past ... saying he was selfish and a liability on defense, which ruined the Nuggets' chances at an NBA title.