Walls are for Criminals, so are the Immigrants Friends?

 Walls of a home, keep a criminal out
And, yes, walls of a prison, keep him inside
 So, before building a wall, along a long southern stretch
Who are our criminals, is a thing to decide

 We don't toss up a wall, to keep away friends
Nor to lock out those in poverty, that they can't have some food
 So, if we build this wall, and stretch it out long
It tells them they're criminals -- people to be shoo-ed

 So, build this wall, and cry how beautiful it is
But in its structure, will hide our own structure too
 For if in the needy, we see an enemy's face
In our judgment of others, we're quite off cue

(Note: I consider a few choices for the wording of verse two, line two. Among them:
"Nor to lock out the poor, that they can't earn their food"
"Nor to lock out the poor, that they can't have some good.")

(Note #2: Index this under Poems)