[surefireinvest]

That is incorrect. Being 'born on fitra' does not mean everyone is born muslim.

Fitrah can mean the primordial disposition in every child for Islam and it can stand for the religion of nature itself, which is Islam. Imam Suyuti said that that best explanation of fitrah is that it is the Sunna of all the Prophets which is in agreement with the revealed Laws, indicated that it is a response to naturally created inclinations.
Imam Muslim narrated; Narrated Abu Huraira: The Messenger of Allāh صلى الله عليه وسلم said, “No one is born except they are upon Al-Fitrāh (instinct). His parents turn him into a Jew or Christian or Magian, just as animals produce their young with perfect limbs. Do you see anything defective?” Then Abu Hurairah, recite the verse if you wish, “So direct your face toward the religion, inclining to truth. (Adhere to) the fitrah of Allāh upon which He has created the people. No change should there be in the creation of Allāh. That is the correct religion, but most of the people do not know.” (Surah Ar-Rūm 30:30)