Moreover, they are unmistakably theological legacies.
The initial theological legacy of 7/7 (and 9/11 before it) is : Where was God ?
Upon reflection one can come up with a theologically coherent and consistent conclusion which is that these incidents occur in what is called the "permissive will of God".
But is that it ?
Let's look at a passage from the book of Amos to a backslidden people :
"I sent plagues among you as I did to Egypt. I killed your young men with the sword, along with your captured horses. I filled your nostrils with the stench of your camps, yet you have not returned to me," declares the LORD.(Amos 4:10)
God actually says he "sent" these disasters on His people.