This guy is almost certainly a cross burner. The article seems like it's downplaying the fact that it wasn't the question "do you think discrimination exists in Idaho" that made him angry, it was this:
“[J]ust because someone hasn’t personally experienced discrimination, doesn’t mean it’s not happening. Racism and discrimination are real issues here in Idaho, as anyone familiar with our state’s history knows,” the statement read. “I highlighted our weak hate crime laws and mentioned the presence of the Aryan Nations in northern Idaho as undeniable evidence of this reality.”
He probably felt called out by the mention of the Aryan Nation groups. I can't imagine any other reason why he'd suddenly lose his shit unless he felt called out.