Racists can love him because he was a racist. Abolitionists can love him because the most visible form of slavery ended about the time he died, and he is credited with ending it.
"Conservatives" can love him because he was a Republican. Liberals can love him because he acted in a "progressive" way by bringing an end to the status quo (by ending the "union" and replacing it with "The Union". He "saved" America by replacing it with The United Stated. This is like saying your life has been saved by turning you into a zombie).
Yep. Good ol' Abe Lincoln; the statists' patron saint. How disgusting he was.