Alina Habba — who represented former President Donald Trump in writer E. Jean Carroll’s defamation suit — is getting roasted for her most recent filing challenging US District Judge Lewis Kaplan’s impartiality. Salon reported that in the 1990s, both Judge Kaplan and Carroll attorney Roberta Kaplan (no relation) worked at the same white shoe law firm. An unnamed source claiming to be a partner at the firm told the New York Post that the fact that Lewis Kaplan mentored Roberta Kaplan was “insane” and “incestuous.” Habba used that to argue that there was an undisclosed conflict of interest and th…