People are not born bad, when born babies have no morals or judgement, they cannot determine good from bad. Statistics show that those born into a violent household or raised around domestic abuse are more likely to repeat it. This isn’t because they were born evil, it is because they were taught that it was okay or acceptable. Being born evil would also mean that people cannot be influenced, which is false. Morals begin to develop from around the age of two or three, but the years that the mind is most malleable is during early puberty or the tween years. This is also proven;t therefore, being born evil is not possible. No one comes out of the womb with evil and destructive thoughts on their mind.
Also just want to mention that if you wanted you could also add a point about religion. All (or most) religion have the same idea that humans are most pure at birth.