The words Islam and Muslim has different and distinct meaning which are not the same and not synonymous.Thor wrote: According to Islam every child is born as a Muslim ( Fitra ), Everyone is unfaithful to Islam until they come back into the fold. Am I not correct?
If so, Muslims who call Americans for infidels do so because their religion tells them that Americans are Muslims who have fallen away. All who will not submit are Infidels.
You are mixing the words when they are not the same meaning.
Islam means the religion, while Muslim means the person.
The Qur'an describes many prophets and messengers within Judiaism and Christianity, and their respective followers, as Muslim: Adam, Noah, Abraham, Jacob, Moses, Ishmael, and Jesus and his apostles are all considered to be Muslims in the Qur'an. The Qur'an states that these men were Muslims because they submitted to God, preached His message and upheld His values, which included praying, charity, fasting and pilgrimage. Thus, in Surah 3:52 of the Qur'an, Jesus' disciples tell him, "We believe in God; and you be our witness that we are Muslims (wa-shahad be anna muslimūn)." In Muslim belief, before the Qur'an, God had given the Tawrat (Torah, Old Testament) to Moses, the Zabur (Psalms) to David and the Injil (Gospel, New Testament) to Jesus, who are all considered important Muslim prophets. Link source: Wikipedia
As such any person who is Christian or Jewish or any individual that submits to God is thereby a Muslim ~ according to this definition.
When they say a Christian is a Muslim then that means they a person who submits to God as a Christian - not Islamic.
As such calling every baby born as a Muslim simply means that every baby is born as a child of God.
Being a Muslim does not really make the person into the religion of Islam.
The USA and Americans are called infidels because of our infidelity to God, and not because of infidelity to Islam, and that is accurate.