This isn't funny, and it isn't fun. It isn't something to “just relax” over. This sort of callous disregard for the severity of what was happening in that room she was in, what's happening in rooms like that up and down the border, literally is part of how we enable it getting worse.
If she herself actively disagrees with family separation and mass detention, I don't know what she's thinking basking in attention she received for being filmed in front of a crime against humanity. If she supports these policies, well, this sort of having fun with it is precisely the problem, and it certainly is perfectly consistent with having secret Facebook groups.