I don't support any of these things. I think the government is extorting money thanks to its monopoly on violence, misallocates resources and delivers services of poor quality. I'd be happy to see as many government agencies replaced with private ventures as possible.

That's the Theory. Now Theory meets Practice, so to speak.

If I stop paying taxes, I go to jail (this is certain, not unknown) and my family suffers.

So you rather support war, genocide, theft... because of what, fear of the unknown?

I mean, if you truly believe that, go right ahead. Stop paying taxes, and when you inevitably end up in court, go and try to make that argument. If you succeed, I would genuinely be happy for you (along with many more people, as that would establish a legal precedence).

But not everyone can take that chance because of the downside in case you fail to convince the court of your argument. See, it's hard to feed your family when you're in jail and seldom few people are willing to sacrifice their loved ones on a principle.