Great question!! Because the Democrats are trying to hide their history. This is history and Dims have always tried to cover their tracks and blame racism on AMERICA as if they had nothing whatsoever to do with it. They blame everyone and anyone but themselves. They even tried to distance themselves in the 50-60s by blaming the SOUTH and coined the trerm DIXIECRATS. Malcome X called them out when he said that A DEMOCRAT AIN'T NOTHING BUT A DIXIECRAT. They are the same and their game of hiding their past continues today. Nice try though. Pick up a history book which wasn't written by the left - if you can find one today.
There is no more confederacy. The difference here is that the left mainstreams their radicals and push them on the rest of us and places them in places of leadership while we denounce the radicals on our side. We are not the same.
I just finished a great book on him called "New Deal of Raw Deal" and it pulls off the cover of the fake history we have been taught about him. It covers what you correctly stated and much more. He was a king if there ever was one. He was a Communist when you really look at his actions.
We probably agree on a lot of issues but I think you got this wrong. The anologies doesn't align. Marriage is different in some major ways and I think they are significant enough that you would be better off using another analogy - like the feeding of illegals with our tax dollars or the Welfare state in general. Or even the size of government. The point behind this seems a little ambigious. It's definitly a great "mind puzzle" though as I like to look at arguments for and against all sides and I argue against abortion and for marriage. I try to look at my own arguments and if they have weaknesses in them and where. This one I'm admittantly wrestling with the arguments within and what you are arguing for - or against.