No thanks.
The simplest preventative measure would be to prohibit Muslim immigration to the US. But as we can see (and has been true at least since Bush) the ruling class here has open borders pretty close to their #1 priority. Bush created a huge, bloated bureaucracy of groin gropers rather than seal the borers and get control of the Muslim problem here.
So at the moment, it's impossible to defend ourselves (or our liberty) without first removing the current political and business elite.