You shouldn't get flamed. According to Wilkipedia, that's actually where the movement started.
"The Knights of Columbus, the world's largest Catholic fraternal service organization, in New York City felt that the pledge was incomplete without any reference to a deity.[4] Appealing to the authority of Abraham Lincoln, the Knights felt that the words "under God" which were from Lincoln’s Gettysburg Address were most appropriate to add to the Pledge.[citation needed] In New York City on April 30, 1951, the Board of Directors of the Knights of Columbus adopted a resolution to amend their recitation of the Pledge of Allegiance at the opening of each of the meetings of the 800 Fourth Degree Assemblies of the Knights of Columbus by addition of the words "under God" after the words "one nation." In the following two years, the idea spread throughout Knights of Columbus organizations nationwide. On August 21, 1952, the Supreme Council of the Knights of Columbus at its annual meeting adopted a resolution urging that the change be made universal and copies of this resolution were sent to the President, the Vice President (as Presiding Officer of the Senate) and the Speaker of the House of Representatives. The National Fraternal Congress meeting in Boston on September 24, 1952, adopted a similar resolution upon the recommendation of its President, Supreme Knight Luke E. Hart. Several State Fraternal Congresses acted likewise almost immediately thereafter. This campaign led to several official attempts to prompt Congress to adopt the Knights of Columbus’ policy for the entire nation. These attempts failed."