I assume you mean GWB, not his father.
Sure, after 911, GWB tried to hard to get the public to buy into "Islam means peace." He even had a young Anwar Al-Alwaki speaking at an Islam unity forum.
But, I blame Obama the most. He was the one who set up, by EO, a "Welcoming Communities" scheme which smoothed the transition from incoming at immigration to Muslim immigrant packed communities in selected cities, and their access to government welfare.
GWB would be Bush Junior. His father is at fault for this mess.
Of course "accepting responsibility" is a trait that seems to have vanished from out culture. It is much easier to blame someone or something else for all that is wrong in our lives.
Both Alexis de Tocqueville and Benjamin Franklin opined about the end of the Republic.