Why replicants killed by blade runners?

In the movie 'Blade Runner', replicants are hunted or "retired" as they go against "The Tyrell Corporations'" moral, social and natural objectives as well as those of the human society due to their unique qualities which makes them potentially dangerous to mankind due to their enhanced capacities to act like the real human beings except the lack of emotional feeling due to being artificially created machines without souls unlike human species created by The Creator, as explained.