Provide statistics. From what I have seen the scores for Home school versus public school all HUGELY favor homeschool.
My wife and I homeschooled our children (natural and adopted). The kids all went on to higher education and were all honor students in College. When we started a third of a century ago, the state tried to threaten us. Homeschooling parents were frequently arrested and faced prison sentences. It was as if nobody in government had read about Walden Pond. I saw it as my duty to stand up to those idiots.
I made it common knowledge that if they tried that arrest crap with me there would be hell to pay. About that time a homeschooling father was shot dead by the police in Utah when they came to try to take away his children.
In California they wisely stayed away from me. I do not put up with crap from government when government is wrong. I spoke at churches in Southern California, and many families took up home schooling. In all cases we documented our children's progress with SAT tests that showed them to be far above grade level.
The fact that the state was able to harass homeschoolers was wrong. That kind of crap is how the Nazi's were able to get away with all the wrong they inflicted on the German populace. I commend anybody who will fight against government when government is totally wrong.
I homeschooled for very simple reasons. I knew that we could do a far better job than the weird State of California, the most wasteful state in the history of the world when it comes to funding public education (The most money spent with the poorest results as documented by the state itself.). I have long agitated for a voucher system here in California. It would save the state Billions.
We received threatening letter at the beginning. Towards the end of our experiment (years later) the Great State of California was offering to help us with books. We never took advantage of that, because all of the books that they were using were vastly inferior to the ones we had purchased for our kids. We found the Menonite text books to be of the best quality.
Sure do wish they had given out vouchers back then. We could have cut our costs by tens of thousands of dollars.