So do Americans have an actual risk of getting their Constitutional rights legally revoked?

So yeah, I might be wrong about a few things, but I'm pretty sure my take on the incoming history lesson is fairly accurate. So long ago, in the U.S., sometime after the automobile had been invented; there was an wave an public intoxication and domestic violence. All the fingers were pointed at alcoholic beverages. So under immense pressure from the public, the federal government made the consumption of alcohol illegal on an national by adding an Amendment to the U.S. Constitution. But the resulting War on Beer was getting to expensive to enforce while it was fattening the wallets of crime lords. As such, the government eventually added another amendment that basically said," Please ignore the amendment that we wrote an few years agothat outlawed liquor. We apologize in advance for any future undesirable incidents." Note that this is the first, and so far only time that an amendment to the U.S, Constitution has been repealed.

Now fast-forward to the mass-shooting in Orlando. The guy was on the FBI's watchlist, passed the background checks, was born on American soil, and legally brought some of those weapons. One homophobic rampage and a suicide later, I've heard through the grapevine that gun sales are skyrocketing. To me this can mean at least one of an few things: ISIS is running another recruitment drive, new gun laws are being drafted, the 2nd Amendment could be repealed within a few years if enough people go insane and start shooting people, or the old Grand Theft Auto game that I have was actually right about my government trying to take our games away (this is why I love satire).

Now since I don't actually have an stake in the gun argument, since we need those restriction on gun sales. But I'm more concerned about the 1st Amendment getting repealed. Since if one got repealed a few decades ago, I'm pretty sure another can be if something really stupid happens, like an American-based cult like the KKK starts an massacring people again. Or someone invents a new religion that's engineered to actually cause the apocalypse if it gets enough followers instead of those pagan, suicidal cults that popped up earlier in this century.

I know this seems unlikely, but the conspiracy theorist within is telling me that this has an chance of happening since history has an way of repeating itself. But then again, I believe that the next world war will occur within my lifetime and it'll be caused by North Korea or an group of insane terrorists.