And there's only four lights, let's get the accusations of Orwellianism out of the way too.
It's not a matter of "my side has facts and your side has opinions." It's that we disagree on what the facts are. You can find a lot of scientists from a few centuries ago confidently asserting that black people are subhuman. It doesn't magically make them not-racist because they believed it to be a true fact.
Well, yes, there is a creepy element of Orwellianism to this. And the creepy Orwellianism comes in when you make comparisons like the one you just made - that I’m somehow wrong today because, centuries ago, a few scientists had some pet racial theories that turned out to be wrong. It’s a deliberate inversion of language meant to get people to submit.
It's not a matter of "my side has facts and your side has opinions." It's that we disagree on what the facts are. You can find a lot of scientists from a few centuries ago confidently asserting that black people are subhuman. It doesn't magically make them not-racist because they believed it to be a true fact.
They were wrong, and you are wrong.