Before passing judgment consider that while you may have the privilege of posting from a country that's never had to fight for relief from tyranny, that's not necessarily the case for others.
Totally agree. I’m speaking to cases in America. If you’re in a rich country broadly at peace with competitive elections to any degree, and you’re choosing violence, you should vacation to e.g. Burma or Sudan or Libya or Ethiopia and see the cost of the violence you’re glorifying.
Since your point seems to be that not all the founding fathers parent was referring to were actually slave owners do you have a claim for a rough ratio? I think that would be interesting and would be a more informative thing regardless of where on the scale it lands from "everybody but Adams" all the way up to "only a big names like Washington, Jefferson".
To a first order approximation half the founders were from New England (no slavery) and the other half were from Virginia (no realistic chance of being important/rich enough to be a signatory without owning slaves). So call it 50-50