What a miserable, angry world you inhabit, that you're willing to hurt some of the most vulnerable people on the planet, because of a useless worry that someone somewhere might be taking advantage of us.
Perhaps you should climb down off of your ivory tower and visit blue-collar America from time to time. You're accusing me of hurting others, while defending policies that... hurt others.
There is no "unchecked migration" to the United States. There's a hard cap on the number of refugees that can be admitted every year, and the asylum process is long, complex, and stressful.
Over the past 10 years, more than 50% of asylum claims have been denied. So it's not like claiming asylum comes with any sort of guarantees either.