I think it's better if you Google that.
My point has been that "don't" and "can't" are not the same, and it's really, really remarkable how difficult it seems to be to get people to think on their feet and understand that fact. Like, I get that before this thread started, a lot of people have read that liberals oppose photo-ID requirements for voting and that a good response is to say that they don't believe that minorities are capable of acquiring photo IDs, but the response to having it pointed out that that's obviously not the argument that anyone makes is cowlike incomprehension followed by a continual repeating of the talking point.
As for the broader issue, I agree it should be a non-issue. We know that in-person voter fraud is stupid, difficult to pull off, and punished extremely harshly, and so basically never occurs. It's a fake issue that sleazy politicians bring up to cheat in elections. BUT it is also ineffective at that (however, part of the reason it's ineffective is that people make a big stink about it, which motivates the very people the laws are designed to reduce turnout among--so if one side whines about it, the other side rationally has to as well).
BTW, another thread where you see a similar udder (heh heh) incomprehension in the face of a challenge to a talking point is the one on the EC. People say "it's a republic, not a democracy" or "mob rule is bad" as if those are arguments against counting everyone's votes equally. But they're arguments (or really just slogans) against having *direct democracy* (where the public votes on policies), not against having people's votes count equally when selecting representatives. No one offering the slogans seems to understand their own argument. They just know what they're supposed to say in that discussion, and then that they're supposed to be mad at people who are thinking.