Wishful thinking will not make it happen. There are too many who don't see the danger in a civilization which believes in the koran. Too many who don't want to be called intolerant. Too many who really do think that Islam has only been hijacked by terrorists. Too many who believe in live and let live. Muslims will become a protected species in the U.S. thru laws and legislation. Too many will be too full of themselves to care until it will be too late to care.
I believe that you have discerned the situation correctly. I am betting that you are over 50, white, male, and a veteran of the US military.
That is beginning to change...
Frankly, at this point Id have to give odds on islam winning. It might take them a century of more but they are relentless. There have been studies done on situations when such disparate entities meet and the lower entity usually wins. As an example, in an excellent neighborhood, when bad people move in, the good people move out. Unless the vermin is dealt with quickly and without mercy, the vermin wins.