I have seen the religious zealots come out of homeschooling too. But do you have a source that has actual data showing that those are not a minority of the homeschool population?
I see no reason to believe they are the majority simply because they are visible.
I actually do. I won't be able to say much because I'd like this account to remain anonymous, but my parents are/were notable figures in the homeschooling movement. At least from the 90s-00s, religious homeschoolers were the solid majority of all homeschoolers in the US by far. Many of which are more extreme than you probably imagine.
I see no reason to believe they are the majority simply because they are visible.