Well, here is some further truth. In reply to the statement "So, did anyone ever find what the meaning of "Separation of Church and State" means exactly, as in how did the founding fathers mean it to mean in the Constitution.", I offer the following quotes from James Madison, commonly known as the "Father of the Constitution":
Every new and successful example, therefore, of a perfect separation between the ecclesiastical and civil matters, is of importance; and I have no doubt that every new example will succeed, as every past one has done, in showing that religion and Government will both exist in greater purity the less they are mixed together (Letter to Edward Livingston, July 10, 1822).
To the Baptist Churches on Neal's Greek on Black Creek, North Carolina I have received, fellow-citizens, your address, approving my objection to the Bill containing a grant of public land to the Baptist Church at Salem Meeting House, Mississippi Territory. Having always regarded the practical distinction between Religion and Civil Government as essential to the purity of both, and as guaranteed by the Constitution of the United States, I could not have otherwise discharged my duty on the occasion which presented itself (Letter to Baptist Churches in North Carolina, June 3, 1811).
Congress should not establish a religion and enforce the legal observation of it by law, nor compel men to worship God in any manner contary to their conscience, or that one sect might obtain a pre-eminence, or two combined together, and establish a religion to which they would compel others to conform (Annals of Congress, Sat Aug 15th, 1789 pages 730 - 731).
There is plenty more, but in the interests of space I'll desist. Ultimately, although what is written in the Constitution CAN be taken to mean only that there shall be no "State" religion, by virtue of studying other written works by the Framers you can discern that it was intended more broadly. My analysis leads me to conclude that having a Judeo-Christian religious phrase in our Country's Pledge of Allegience constitutes both giving pre-eminence to specific religions and compels others to partake in a form of worship that may be contrary to their views.