It does not matter that the Church comes out with one voice in rejecting the policy of breaking up families. It does not matter that the misuse of scripture is called out for what it is. It does not even matter that the Methodist Church that Jeff Sessions belongs to has rebuked him for using scripture to support a policy that harms children. None of that matters in the long run if that is all the Church does.
Jeff Sessions' assessment that separating children from their parents is justified because Paul says in Romans 13 that it is God who establishes governments, and that the people should submit to their authority, highlights the legal slippery-slope of an asynchronous application of biblical edicts without regard to biblical context.
Remarkably, Donald Trump is one who never hid his moral shortcomings, but boasted that he did not need God's forgiveness, lauded his sexual misdeeds, reveled in his mendacity and misogyny, and mocked the disabled.
To suggest that it is inappropriate to call out white evangelicals at this point in time, is giving in to the kind of pernicious moral equivalence that excuses bad behavior and normalizes ungodliness.