A vote can harm a lot more people than any individual’s gun.
Bad votes can do much more damage collectively, but the odds that a single vote will make a difference is slight, because so few elections are decided by only one vote. It happens, though. My point is that if showing an ID is too burdensome, or “intimidating” a requirement for voting, it’s also too burdensome, or intimidating, to require for gun purchases. There is a right to vote, and there is a right to buy guns, and criminals and illegal aliens aren’t supposed to do either one. (So, you’ve got to check, right?)