Oh please! Radical Islam had been around long before George W. Bush ever got in to politics. It began to flourish when the State of Israel was founded, and the destruction of Israel has been its focus ever since. Anyone seen to be helping Israel is considered an enemy to Islam.
It long predates the re-establishment of Israel as well. The first Islamic terrorist was Mohammad - from the moment he got his "vision" he turned into a murdering, lying, booty-plundering, slave-taking, child-raping terrorist. What can you say about a religion whose sole prophet spent almost his entire adult life killing people?