It's not because Rob Bell is a heretic, of course, and it's not even because fundamentalists are giving Rob Bell crap for being a heretic. Actually, I'm not sure where the angry is coming from. Maybe it's because even edgy Rob Bell doesn't have enough balls or brains to embrace the label "universalist".
Or maybe it's this bit:
Bell would not be surprised if he saw Gandhi in heaven. “Jesus was very clear. Heaven is full of surprises. That’s central to Jesus [sic] teaching.”
HOLY F#@$. YOU MEAN THAT HEATHEN GANDHI MIGHT BE IN HEAVEN WITH ROB BELL? How about this instead, you pretentious MORONS?
Bell would be mildly surprised if Gandhi saw him in heaven. "I don't really think I'm on the same moral plane as someone like Gandhi," Bell said, "But who knows? We can hope, right?"