He certainly was part of the problem, but I think that the way it was phrased originally implied he was the majority of the problem. In truth, these measures had broad support from not only our elected representatives, but from the people themselves. Turns out that people do not actually give a shit about civil liberties, and our representative democracy acted accordingly.
Also, Bush had to sign the ASTA into law (checks and balances) which he did so he's part of the problem.