As criticism of Donald Trump continues to grow over the administration’s escalating conflict with Iran, the president has once again shifted attention in a way that feels all too familiar — by making inflammatory comments about entire groups of people and invoking rhetoric that critics say echoes the language of eugenics. During a radio interview released this week, Trump responded to a series of recent violent attacks across the United States by blaming what he described as the “genetics” of the people responsible. The remarks came after violent incidents at a university in Virginia, a synagogue in Michigan, and an …