Because there is a war going on between certain parties of "voting" dillema blah blah blah. I see there is a problem with down voting with your ego talking about there needs to be an explanation for it. But I see no complaints about the 50+ people who voted up without giving an explanation either.
Look. People got the right to express themselves with a vote or comment or both or neither by just ignoring you or muting etc. they don't need to explain to you or to anyone for that matter for their expression.
But I will tell you mine. It is quiet simple.
I don't support slavery or anyone who advocates slavery. Don't see it that way? not my problem. Here is a book you can read to further illustrate my point.
"The Most Dangerous Superstition by Larken Rose"
Or maybe a short video?