Take it back to the roots. Watch their unconditioned responses to the totally Western constructions that are 'gender' etc.
Is it not the case that these people are allowed their opinions? Are they bigots?? Wha..whu..wh... cue SJW meltdown when they realise they have to edumacate ACTUAL Africans without imposing Western cultural elite positions (positions that also patronise hard-working Africans, BTW, but that's another post entirely)...
These various world views are not compatible. The Emperor has no c0ck!
Walsh included that in his film because the left was saying that 'two sexes' was a White colonizing construct and that everywhere else in the world there's a spectrum of 'genders', which basically means sexes, no matter how they couch it.
I've seen some try to counter what is seen in the video by saying that Matt Walsh cherrypicked the one tribe in Africa whose world view coincided with his White supremacist beliefs.

The 'left' has had such a stranglehold over information that they don't realize how easily someone with a platform can contradict them.