There were slaves in the north also. Hate is a strong word, lack of respect for the humanity of blacks would fit better. Remember the US Constitution said they were 3/5"s of a person, OBVIOUSLY wrong, but Hate, I"m not so sure, doesn't historical context mean anything, or did Washington and Jefferson HATE blacks too?
There were slaves in the north also.
Blacks could vote in five northern states in 1860. The slave power was determined to get away from any combination that could elect a president publicly opposed to slavery.
Walt