Governments can do lots of things, but there are a lot of things they cannot do. A government can provide good housing, but folks can have a house without having a home. We can keep people breathing with good health care, but they still may not really be alive.
It is the church's responsibility, the government's responsibility, and the personal responsibility of every one of us to love.
When it comes to the big issues like immigration, everyone has a role. The government has a role. The church has a role. Every Christian has a role.