"government" in general didn't decide US law enforcement and intelligence agencies needed to make terrorism a top priority, and it didn't decide the US needed "extrajudicial" options for dealing with terrorism, such as torture, kidnapping and indefinite detainment in a death camp in Cuba, and didn't decide to wage a war against "terrorism."
All of these things are the direct result of the Bush Administration taking advantage of post-9/11 fears to push the PATRIOT Act, and the "new normal" that terrorism posed such a grave and existential threat that nothing, not even the Constitution or the rule of law, should be allowed to get in the way of fighting it.
That would be the Patriot Act that was voted for by (among others) Hillary Clinton, Joe Biden, Barbara Boxer, Dianne Feinstein, John Kerry, and Ted Kennedy, and whose reauthorization in 2006 was voted for by Barack Obama?
You're missing some of the things that have been done before the Bush Administration. Operation Northwoods is alarming as it is, and that's back in the early 60's.
Sure, but the FBI demanding warrantless access to browser history in order to fight terrorism, and expecting to get it, is a direct result of Bush administration policy.