"...because there is no doubt that he was a great and good man."
Prov. 17:15 "He that justifieth the wicked and he that condemneth the just, even they are an abomination to the Lord."
Do you really like the etrenched bureaucracy, the big government, the high taxation we have in Washington today? If so, you are right in praising Lincoln.
Jefferson Davis installed a more intrusive government - including the first conscription, forced levy of farm products for military used, appropriation of slave labor for military use - and he tried to force through income taxes many times higher than those proposed by Lincoln. If you support Davis then wouldn't you be proposing a worse system than Lincoln every imagined?