They both believe in one God.
Yes, the nation of Greece is 98% Greek Orthodox, which is one of the oldest branches of the Oldest Christian Church. The orhodox faith differs from the Catholic in hierarchal structure as well as spiritual tradions, but teachings and dogma are pretty similar. Other 2% of Greeks are from the Catholic, Jewish, or Islamic Faith mostly from the Islamic and Jewish faith.
Dogma and faith are similar in that dogma requires the assent of Faith.
Killing innocent people is prohibited in islam its not part of Islamic Faith.
No, catholic faith originated in Rome
The Protestant faith, of which the Lutheran faith was the oldest form.
yes
Yes, there are many, many female saints in the Catholic faith.
Catholic Faith
In the Catholic faith, angels are believed to possess free will.
Each Islamic country has its capital city but if you mean the spiritual capital of the Islamic faith then it's the city of Mecca (Makkah).
The Islamic faith believes in Allah.
The Islam faith was founded in about 610 A.D. It was fouded by Muhammad.