CNN staffers are fuming over Don Lemon’s cringeworthy apology for his on-air, sexist diatribe about 51-year-old Nikki Haley — with some calling for the anchor to be fired. Above, host Kaitlan Collins, right, with Audie Cornish. CNNDon Lemon apologized to CNN staff for his sexist remarks Friday, but many employees felt his words only made things worse. Evan Agostini/Invision/APLemon’s apology follows a drumbeat of self-inflicted wounds, including The Post’s report that Lemon screamed at his “CNN This Morning” co-anchor Kaitlan Collins, after she interrupted him on air in December. Lemon’s blowup reportedly upset his co-hosts Kaitlan Collins (L) and Poppy Harlow (R), as network boss Licht scrambles to clean up the anchor’s mess.