The Lord cares for the poor. These were the marginalized and oppressed (people pushed aside and treated unfairly; see Isaiah 1:17). But God is their protector (see 25:4).
God asked his people to share his concern for the poor. But instead of helping the poor, many Israelites exploited them to gain wealth (see Isaiah 3:14). They used their power to take advantage of those who could not defend themselves.