“Can you cite a source for Lee owning slaves?”
http://www.sonofthesouth.net/leefoundation/lees%20slave.htm
https://en.wikipedia.org/wiki/Robert_E._Lee#Late_1850s:_Arlington_plantation_and_the_Custis_slaves
“Regardless, even if he did, so what? Many of America’s Founding Fathers were also slaveowners, including Washington and Jefferson.”
Your quarrel is with the lost causers, not me. I have no problem with the fact that Lee owned slaves since it was legal at the time (and especially under the circumstances how he came to be the master of those slaves). I was merely correcting a misstatement.
According to the wikipedia article, it looks as though Lee was more or less stuck with them as an inheritance (more of a burden than a gift), as opposed to going out of his way to acquire slaves.