In Fahrenheit 451 what does Montag say about the bombers?
Your question refers to the last few pages of the novel, where Montag has already escaped from the clutches of the mechanical hound and is with the book people. Montag doesn't actually "say" that much - it is he that draws the book people's attention to the bombing with the single word "Look!" and then the narrator describes Montag's response:
This was not to be believed. It was merely a gesture. Montag saw the flirt of a great metal fist over the far city and he knew the scream of the jets that would follow, would say, after the deed, distintegrate, leave no stone on another, perish. Die.
This triggers off Montag's silent cry to all his friends in the city - to Mildred, to Faber and to Clarisse. He imagines Mildred enjoying her "family" and her death, and this rather poignantly makes him remember something he had forgotten: where he and Mildred had met - in Chicago. The blast of the bomb also helps remember scraps of Eclesiastes and Revelation, that Montag takes with him as we wanders with the book people.
So interestingly, Montag does not express an opinion about the bombers - he is actually more optimistic about the potential for new birth that is echoed in Granger's story of the phoenix now that his old world has been destroyed.