How did Egypt become Islamic?

Answer 1

Christians in Egypt were minority and were under the excessive aggression and control of the Byzantine rulers who were opposing their faith. They asked rescue of the Muslim Caliph Omar for their knowing of his justice. Then Muslims invaded Egypt and conquered the Romans and give freedom to the Christians to practice their religion rituals in public and not secretly as it was during the Roman occupation to Egypt. Through hundreds of years, many Egyptians converted to Islamic faith and till now you find many families partly Muslims and partly Christians.