Consider two critical issues: refugees and guns. Trump is going berserk over the former, but wants to ease rules on the latter. So let’s look at the relative risks.In the four decades between 1975 and 2015, terrorists born in the seven nations in Trump’s travel ban killed zero people in America, according to the Cato Institute. Zero. In that same period, guns claimed 1.34 million lives in America, including murders, suicides and accidents. That’s about as many people as live in Boston and Seattle combined.It’s also roughly as many Americans as died in all the wars in American history since the American Revolution, depending on the estimate used for Civil War dead.