So not every confederate was a democrat and not every democrat was a confederate. So what? The democrats’ ties to the confederacy and slavery are so thoroughly documented that you would have to be a rabid leftist to deny them. That Whigs were also involved does nothing to refute this. Everyone can search for “democrats the confederacy and slavery” and decide for themselves who did what.
That’s certainly a popular child’s version of history, but children have an excuse for being ignorant. Adults not so much. Slavery in the US preceded the Democratic party by 200 years and when the party was founded in 1828 slavery wasn’t part of the national debate. Tariffs, internal improvements, and the national bank were the issues day, the same ones that dominated the 1824 election. One of the two Founders of the Democratic party, Martin Van Buren, was opposed to slavery, was opposed to the admission of Texas as a slave state, and was an outspoken abolitionist. Apparently he didn’t get the memo informing him that the party he co-founded was “the slave party”. Go figure. Maybe that’s what happens when google isn’t your primary source.