What do you refer to? I send all my kids to private schools are there anti-private mandates in some places?

They're probably referring to the very reasonable idea that funds for public schools shouldn't be diverted to private and religious schools under the "school choice" banner because it intentionally defunds public schools for private schools that have very little oversight and standards, and acts as an unneeded subsidy for wealthier families.

Some folks regard the stance that public school taxes are supposed to pay for having a public school system, not for redistribution to parents to spend on any schools they want, as being tyrannical.

It's whether or not the government subsidizes your private school via vouchers. The consequence is that public school budgets are further diminished, reducing and eventually eliminating the project to educate the whole citizenry, further stratifying society.