It is really starting to look like we're going to get a "compromise" of a semiautomatic rifle ban coupled with state repressions of Muslims, and it'll be presented as a compromise between left and right instead of a solid win for authoritarianism. If not after Orlando, then after the next one, or the next one, or the next one.
ISIL/Daesh has not been shy about saying that their goal is to make western liberal democracies intolerant of moderate Muslims in order to push moderate Muslims into feeling like they have no choice but to radicalize or abandon their religion and become apostates. The part two of their plan is to have those Muslims either come to Syria and fight in the apocalypse or stay in their home countries and carry out further attacks towards that goal.
When somebody like Bill O'Reilly goes on the Colbert Report and talks about how he'd be open to banning "assault rifles" so long as Congress literally declares war on Islamic terrorism so that suspected Islamists can be indefinitely detained until the "end of the war", *and gets cheered* by a vocally "left wing" audience, that's where we're headed.
Oh sure, some people will say there are good Muslims and point to examples of these and say we're only putting the bad ones in camps, the ones that can't adapt to be peaceful. If this script sounds familiar, it's because we dusted it off from when it was used on the Native Americans and the Jews and the Australian Aborigines.
How could this happen? Wouldn't the left not stand for it? Well, except for the atheist left, led and inspired by luminaries and media figures like Bill Maher and Richard Dawkins, who make the argument that there can be no moderate muslims. With our society's fetish for the fallacy of the golden mean, the argument to moderation, the rest of the left will take the midpoint position that it's okay to indefinitely detain the "bad" muslims so long as we respect the "good" muslims. That will be enough to get the camel's nose in the tent, and the alliance between the atheist left and the anti-muslim Christian right will take care of the rest, probably after a few more attacks from previously moderate muslims.
There are only 1.6 million Muslims in America, that's not a big enough group in a country of 320+ million people to keep them safe, the tyranny of the majority in a democracy comes into play.
I don't know that there's a way to stop this either. I think the carrot of an AWB will be too much for the authoritarian left to resist, and the carrot of anti-muslim pogroms too much for the authoritarian right to resist, and the genuine anti-authoritarians in America are a minority probably comparable in size to the Muslims. Will Orlando be enough to push us over the edge? Maybe, maybe not, but these attacks are not going to stop and they *can't* be stopped. How many more attacks do you think it would take? Pick a number and check back with me once we reach it.
The easiest part of this would be the legal side of it. You'd need nothing more than a constitutional amendment saying simply "The First Amendment does not apply to the Muslim religion. The Second Amendment does not apply to semiautomatic or other military weaponry, which may be further regulated by Congress and the states." The phrasing can be finessed around, like "The First Amendment does not protect criminal organizations which operate under the color of religion" or something like that. Same for the phrasing of the second part. It will seem appealing to a broad number of people. All it takes is a Constitutional amendment and it'll be totally legal.
And when it happens, it will be hailed as bipartisanship and met with thunderous applause.