Officially, I'm not sure Congress can pass any such law as it would violate the first amendment. That said, I do agree that our leaders need to do more to encourage a discussion about religious tolerance, and in fact, tolerance in general.
First, if Congress has proven anything it's that it'll pass anything it damn well pleases. Their regard for constitutional limitations is historic in nature, and quite unlike anything they do today.
Like the tax codes, any law may to written to apply generally to everyone, yet with conditions that directly apply it to someone. This could be no different, any outreach program could be universal while given specific criteria that match our agenda.
Second, your point seems to sound a lot like Craig and Democrats which I must warn you. This focus on our tolerance, on what we must do. Yes, we must do our part, though I fear what you're missing if this were only about us and you left Islam out entirely.
Tolerance is important, but their part is no less than ours.
All we can do is lend out our hand and give the moderates a chance to rise above the rest. Without them on the front line, as our first line of defense, there can be no trust. We have to do everything possible to get that sort of cooperation, of that assimilation into our society.
I think today is a day that we can all use to step back away from the noise and chatter to remember that the things we have in common are much greater than the differences we have. If such a horror was to repeat itself again, I still believe our petty squabbles would be put aside.
I'm certain that if it were repeated, that many would blame them as a whole again. Ever since that initial wound the following actions are cuts that dig a little deeper. People reinforce their positions, such actions only contribute.
Which is why there has to be a counter action. A public effort that involves a building of trust. This cannot just go on behind the scenes. The outreach must be no less known than September 11th. Do we have any such programs? I do not know of them, do you?
What the American public knows of Islam is September 11th. Of foreign imagery where violence and threats are common against us. Of two wars where Muslims are killing our soldiers. That is our common knowledge. That will not secure peace. The public image must be changed and it begins at home. It requires both sides.