I thought this was the best paragraph in the speech last night. A very nice turn of phrase:
We have seen their kind before. They’re the heirs of all the murderous ideologies of the 20th century. By sacrificing human life to serve their radical visions, by abandoning every value except the will to power, they follow in the path of fascism, Nazism and totalitarianism. And they will follow that path all the way to where it ends in history’s unmarked grave of discarded lies.