The fact is that if you look into the people who are promoting intelligent design, you'll find they are overwhelmingly the same people who have pushed creationism all along. It's like the Greens, who are dominated by "former" communists, pushing the same agenda under a different name. Sure, they picked up a few outsiders, but it makes no difference.
If you were never a creationist, it just means you're part of the fig leaf.
I can asssure you the Thomas Aquinas folks and the creationism folks are very different crowds. Like capitalism and communism.