You know how atheists almost never venture outside of the Old Testament lest they run into teachings of Jesus that convict them of wrong? And you know how atheists accuse Christians of cherry-picking verses to make our case? Do you think atheists ever do the same thing? Like, have you ever seen them ranting about this?
Leviticus 19: 32-34 - Rise in the presence of the aged, show respect for the elderly and revere your God. I am the LORD. When an alien lives with you in your land, do not mistreat him. The alien living with you must be treated as one of your native-born. Love him as yourself. I am the LORD your God.