When you are aware of your actions causing suffering to others, it is imperative to address the situation. As an American, I know we have unwittingly been the biggest contributors to climate change. 

And I know of the migration from the Northern Triangle of Central America. These migrant farmers did not want to leave their lands. But climate change exasperated this drought-prone region till no arable lands was left.

I looked in Wikipedia about the treatment of slaves in Biblical times. (This is not at all to imply that refugees become slaves.) 

Debt slaves were one of the two categories of slaves in ancient Jewish society. As the name implies, these individuals sold themselves into slavery in order to pay off debts they may have accrued.[1] These individuals were not permanently in this situation and were usually released after six to seven years. 

Fugitive slaves

The Deuteronomic Code forbids the Israelites from handing over fugitive slaves to their masters or oppressing them, and instructs that these fugitives should be allowed to reside where they wish.

The climate refugees from Central America should be allowed to settle wherever they want. We should assist them in getting back on their feet. For example, a work visa and residency program “is a good first step, but not enough to respect those people’s rights and allow them to migrate with dignity.”