So now we have this huge intelligence apparatus that no doubt pays a fortune to political hacks of all persuasions, but mainly Republicans, because Bush and Cheney had more time to get their guys in. No doubt there are still some well educated, skilled intelligence professionals in the ranks, but they are lost among the mediocre. I would guess that particularly the private companies, the loves of Republicans, are more willing to say whatever the bosses want them to say than career professionals, , who have some cover except in extreme cases, for example when Bush and Cheney ran a vendetta against them.
The good news is that the terrorist threat is not great, nothing like a more historical threat by another nation against the US. By and large these terrorists are poorly funded, not well trained, and poorly led. They may have access to hundreds of millions of dollars, but what is the US defense budget, something like a trillion dollars. It's non-conventional warfare, and in the eighteenth and nineteenth centuries, the Indians inflicted some serious defeats on the white soldiers, but in the end the whites won easily.
Currently, the economic threat from China is much more serious. And if China ever decides to pose a military threat to the US, it will dwarf the terrorist threat from Muslims.