Many, probably most abolitionists, even the ones who were abolitionists because they thought slavery was wrong, and who cared about the plight of the enslaved, were still flaming racists by modern standards. They would have agreed that slavery was wrong, and agreed that black people are above slavery, but a vanishing minority would have agreed that black people were equal to white people, or that they should be able to run for office, or that they should be able to marry white people, etc. The people that actually freed slaves in America would probably be cancelled or have their statues pulled down for racist things they said, if anyone cared to examine them. The abolitionists, as a whole, would definitely fail intersectionality. And this is another problem with retroactively judging people from the past by modern standards instead of respecting them as part of history.