If you want to understand how big of a problem this is.... Only two christian players have ever represented Egypt throughout its history. Both did so over 30 years ago.
Never before and never after has any christian worn the colors of their country.
And the top officials in Egypt keep citing Hany Ramzy (one of the two players mentioned above) as evidence that there's no discrimination towards christian players. Completely missing the fact that he played 30 years ago and only made it that far because he had a name that could work as either a Muslim or a Christian.