Why do some people get offended when "under God" is omitted from the Pledge of Allegiance?

Its offensive to you if its in there and its offensive to me if its not. At least I can take solace in knowing that the Lord will soon end all of this nonsense. It does not violate anything in the Constitution, for by uttering two words, no one is attempting to establish any religion, whether under the auspices of the government, or not. The only ones that believe that are crybaby atheists and the Atheist Criminal Liberties Union.