I don't really care that much to go digging, but it hints to a dysfunction in the family dynamics when most got opposite their parents or as you point out, actively opposite to their parents. They could've just been shitty parents w/a conservative mindset. There's plenty decent hallelujah types that do an ok job w/their kids.
"Gosar was born in Rock Springs, Wyoming, in 1958,[2] son of Antone John Gosar and Bernadette M. (née Erramouspe) Gosar. His paternal grandparents were Slovenian and his maternal grandparents were Basque immigrants from Banca, France."
The other siblings say the parents are conservatives in multiple articles.
Let me state that ignoring the politics -- all the children turned out to be professionals in successful careers. You can make a case that the parents were very successful in raising their children.