Aruch HaShulchan, The Laws of Tzedakah, 251:13

Any beggar who needs food, give it. Even if an idol worshiper comes asking for food, give it. Such is as the sages said: Sustain the poor of other nations along with the poor of Israel in order to keep the peace, and not only along with the poor of Israel, but even if one comes alone (ie and not with any Jews) to take [food], give it. Give to [a Jew] even if they occasionally transgress a sin. You are obligated to sustain that person as it is written: “The life of your brother with you...” [Translation by Rabbi Bruce Elder. Edited for gender neutrality]