What's an "Opposing" View of the Holocaust?

A Texas school district faced backlash after an administrator suggested teachers provide opposing perspectives on the Holocaust, in an attempt to comply with House Bill 3979. The bill requires multiple perspectives on controversial issues, but the district clarified it does not apply to historical facts. The incident sparked public outrage and highlighted the dangers of ignorance.

What was the reaction of the speaker to the idea of teaching a Nazi sympathizer's perspective?

What does House Bill 3979 require from teachers?