My point about Saffuri and his access is simply a restatement of some of what Nick's been saying.
If you had high level access to the WH and the POTUS would you personally take it upon yourself to ensure that whoever you brought in for a visit was on the up and up beforehand, no matter if it was supposed to be "someone else's job" or not?
You have the same two options with Grover as with the White House staff - either he knew, or he didn't. If he didn't know, then perhaps he didn't look, or didn't look hard enough, or simply wasn't able to know what we know now - you'll have to ask Grover which was the case. If he knew, then certainly he should have at least given whatever information he had to the people whose job it is to worry about such things. Perhaps he did - we don't know that either.
But no matter what, I'm essentially being asked to believe that Grover Norquist is so powerful and influential that he can bring anyone he likes into the White House without anyone over there even doing a basic background check on who it is he's bringing. And I'm not at all sure I believe that. Grover Norquist is not in charge of White House security or of national security, and if the people that are in charge of those things are doing their jobs under the assumption that everyone is always totally forthcoming about who they are and what they're up to, then we're screwed. Just plain screwed, because that's no way to run those kinds of operations - bad guys will occasionally lie about themselves and their agendas, and any security apparatus that doesn't take that into account is not doing its job.