Maybe you're just being sarcastic with the reinstitution of slavery remark?

If not, I'm interested in knowing how the idea of promoting racism and slavery could be connected to anything in this article.

I'm the author of this article on homeschooling, and I don't even recall having a thought about racism, slavery, etc. while writing the article.

If the idea is that anyone who respects and reveres the Founding Fathers must be racist, I don't see the connection, although I have seen enough revisionist historical writings that falsely paint them in a poor light (including making all of them racists because they allowed slavery) to discredit the system they set up.

For some examples of how modern historians have changed our view of the Founders, I'd recommend reading "The Jefferson Lies" by David Barton.