As far as I know, only about a third of people in the US back then ever owned slaves.
Okay? We’re talking about the Founders, and they owned slaves. They were directly responsible for it, they had their own plantations. Comparing that to bystanders and voting and buying local and being complacent is absurd.
Are you perhaps under the impression that all Americans in 1776 were Founders? Because generally when USians talk about our Founders we’re talking about the people at the Constitutional Convention and terroist organizations like the Sons of Liberty.