A lifetime ago, Anne Frank’s family applied for visas to the United States to escape Hitler, but we rejected the Franks and other desperate Jewish refugees. We thought: This is Europe’s problem, not ours, and we don’t want to be overrun by “those people.”

Today President Trump is again slamming the door on desperate refugees. Indeed, the Trump administration is going a step further by wrenching children from the arms of asylum-seekers, apparently as a way of inflicting gratuitous cruelty to discourage new arrivals.

José Demar Fuentes, a 30-year-old college graduate, arrived in November with his 1-year-old son, Mateo, from El Salvador, where Fuentes was on a gang’s execution list, according to his lawyer, Noreen Barcena. Father and son entered the United States legally, presenting themselves to an immigration officer, providing birth certificates and other documentation, and requesting asylum to save their lives.

Several days later, immigration officers came and took Mateo.

“They basically pried my client’s son from his arms and told him that he had to give up his son,” Barcena told me. “They were both crying.”