A Haafiz is studying at a Christian secular school.

Answer

The expulsion threat is actually good news. It will be a blessing from Allah Ta'ala for the Haafiz. In the first place it is haraam for a Muslim to be studying at a haraam secular school. In terms of the Shariah it is haraam for Muslims to study at these kuffaar schools which adulterate and even ruin the Imaan of Muslim pupils. Since it is not permissible to attend these kuffaar schools, it is not permissible to assist any Muslim to gain admission.

The kuffaar school authorities are entitled to impose their rules while it is haraam for Muslims to accept such rules. It is haraam for Muslims to be at these schools. The choice is between Imaan and kufr.