Stopping a course because the instructor behaved in inappropriate ways outside the classroom (which is a fuzzy notion with EdX courses) is one thing, which would be an undrstandable step for MIT to defend their reputation.

Taking down existing video content, which is only incidentally connected to the problematic behaviour (Lewin seems to have his role as the course instructor rather than the videos as an excuse to make contact with course participants), to me would be more akin to burning the books written by an unliked person than to any act legitimately defending MITs or the course participants' interests.