Not true at all. Lincoln always opposed slavery, was willing because of the constitution to allow it where it existed, but just like Washington, Madison, and the others founders who even before the Constitution, firmly opposed banned the expansion of slavery to the territories. He believed, correctly I might add, that slavery would have died on its own if confined to the states where it then existed.
The slaveocracy scum you support broke the Union over the issue of expansion. Lincoln was 100% consistantly opposed to expansion from his earliest days in politics. That is all documented quite well and DiLorenzo is nothing but another liar scaming the "Lost Cause" fools who think the South will rise again.