As with everything, it is complex. But no, the abolitionist movement contained many God-fearing Christians who cared deeply about the slaves, and their education, and their transition to earning wages, etc.
The movement also contained many freethinkers and socialists and other radicals...but many of them “cared for” the slaves in their own way, as well.
All of the factors you mention can be found, of course, as we would expect.
But no, it’s not correct that abolitionists didn’t care.
It would also be incorrect to say that all Southern slave owners didn’t care. As with everything, it is complex.
The frustrating part about this idiotic monument tear down movement is that it does nothing to advance humane understanding of well, the human condition. It does nothing to memorialize the heroic fight for freedom among slaves who never really went along with the whole thing, and who when freed, handled themselves magnificently in very difficult circumstances. And it certainly doesn’t respect the nuances of opinions among “slave owners” like George Washington...and yes, even Jefferson.
As well as the nuances of men like Lincoln. And others, for example, Sam Houston....
Thanks for some clear words on this.
Those interested should have a look at Thomas DiLorenzo’s assessment of Lincoln and the reasons behind the civil war.
this might be a good start:
https://youtu.be/nbFty9nZUac
Warning: those anchored in the slaveholder -> democrat trope may find his remarks unsettling.