There is no shortage of information about the North’s racism.
NO ONE disputes this (except those looking for anything to justify “The Noble Cause.)
You cannot ignore the facts that all these states had made slavery illegal (except the Border States) and it cost the Union 600,000 lives in getting rid of it.
This washes away any guilt about prior slavery.
Todays’s Leftists have been complaining about Lincoln’s racism for decades.
Except that they didn’t go to war to get rid of slavery. In fact they offered slavery forever by express constitutional amendment. and yes Lincoln was a flaming racist in addition to being a tyrant.
The Left is mighty selective about their outrage and historical revisionism.