The real explanation is that there's something about Elizabeth Warren that Republicans can't stand.
Democrats see her as very charismatic, personable, and inspirational.
Republicans always complain about how she's the opposite of charismatic and how they just hate her very voice and how she says things in addition to what she says.
I think it's pretty obvious there were sexist connotations here despite the fact that it was partisan maneuvering. And part of it probably was meant as some form of retaliation for the women's march. Telling women and minorities to shut up and "take their seat" is practically a national sport in this country and that's the way it's always been. You don't have to be an 'SJW' or a snowflake or whatever to acknowledge that fact.
Elizabeth Warren is too nasty and Coretta Scott King was too uppity. That's a dangerous combination for some people.