When war came to America did everyone run off, like a bunch of cowards, to some other nation?
I see. So there should be no refugee problem, in your mind. The UN has determined that the planet is currently seeing the largest immigration crisis, worldwide, in history. People who are starving, people who are physically endangered, people who are being threatened for their religion or race or political beliefs are fleeing for safety. It is causing political instability and economic problems everywhere.
Maybe finding ways to mitigate the problems they are fleeing from would be a better approach than simply damning them as cowards, which is both unrealistic and unfair.