A person should treat everyone (person on the same level as he is, person on a level up and most importantly a person on a level below than him) with same integrity and respect. It shows the real character of a person.
The great Muhammad Ali once said, ” I don’t see the character of a person by the way he treats me, i see his character by the way he treats the person lower than him”.
Everyone deserves respect, no matter how rich we are, how much we have achieved in life, we don’t have any authority to disrespect someone and make fun of them.
So, be humble, be respectful, be nice to everyone and in return you will automatically get the respect and love from everyone.