The founding fathers kept slavery in the constitution since the south wouldn't aprove it otherwise. They were planing on taking slavery out since the constitution stated "all men are equal and have unelieble rights". Keep in mind that without the south states to apporve the constitution, it couldn't have been approved.
Answer: The Founding Fathers acknowledged that slavery violated the core American Revolutionary ideal of liberty, their simultaneous commitment to private property rights, principles of limited government, and inter-sectional harmony prevented them from making a bold move against slavery.
