naomi, the procedure under the hostile immigration act required constant checking of migrants' documents. If they didn't have them, the migrants were to be thrown out, on a "deport first, appeal later" basis, as mentioned by ZM. And that's exactly what was done by civil servants.
The problem came when legal immigrants hadn't kept their documents. The law - May's law - made no provision for this. That's May's fault, not the civil servants'. If the migrants had been allowed to explain why they didn't have papers, the civil servants might have been able to investigate; but the policy required them to be deported at once without a chance to explain.
Entirely the fault of the politicians who wrote the law and passed it through parliament. Not the civil servants who implemented an inhumane law correctly. You are far too kind to the politicans of your chosen party.