1.-I have come to terms with the fact that we are not supposed to remember all the evil shit Emma Frost did in the past. She took control of Storm's body and allowed Sebastian Shaw to rape her, helped Mastermind control and rape Jean Grey, provoking the chain of events that ended with Dark Phoenix killing a planet and committing suicide. Tried to brainwash Kitty Pride and turn her into her pet. Killed Firestar's beloved horse in order to make her fall into depression and manipulate her more easily. Earned money from the sale of Sentinels murderbots...etc.
If we remember all that crap, the behaviour or the X-Men towards her becomes incomprehensible. Storm, Cyclops and Jean Grey should have threatened to leave the X-Men when Xavier entrusted Frost with Generation X. Or what the f**k, they should have ganged on her and sent her back to coma.
Not to mention how well the X-Men as a whole took it when Cyclops cheated on Jean Grey with the woman who had her raped, and helped corrupt her and make her go mad, provoking her suicide.
So, in order for Emma Frost's story to make an ounce of sense, we have to accept that a) The X-Men are a bunch of sociopaths, or b) The evil past of Emma Frost has been retconned out of existance. For the sake of my own enjoyment of the books, I have to go for b).
2.-And anyways, Iceman was supposed to have said it as an insult against Jeen. It being true or false isn't that relevant.