Some people need to be treated with extra special care.
It’s a Mitzvah to be especially nice to a Ger, to someone who converted to Judaism, and not to remind him that he was once not Jewish. After all, this person feels badly that he wasn’t born Jewish and he or she gave up a lot to become Jewish.
HaShem said, “You know how a Ger, a stranger feels. You yourselves were all once strangers in the land of Egypt.”
We are also told to be very kind and sensitive to an orphan (a child who doesn’t have parents), and a widow (a woman whose husband is no longer alive). It is a special Mitzvah to invite them to our homes and cheer them up.
These are 3 special cases where the Torah tells us to be extra caring, but of course it’s always good to be kind and helpful to everyone. When you see someone who needs help, try to make it easier for him or her and help in any way possible. It might be your brother, your sister, your classmate, or even an old lady who needs help crossing the street. Remember, it’s a very big Mitzvah!