This is appalling and completely out of step with American values and will no doubt lead to more aggressive attacks on Christians within our own borders.
The National Cathedral is a place of worship for Christians. Muslims throughout history destroy Churches. take them for themselves to become Mosques.
This is the what the Muslim state quite openly: " Jesus is not the Son of God: “O People of the Scripture! Do not exaggerate in your religion nor utter aught concerning Allah save the truth. The Messiah, Jesus son of Mary, was only a messenger of Allah, and His word which He conveyed unto Mary, and a spirit from Him. So believe in Allah and His messengers, and say not “Three” – Cease! (it is) better for you! – Allah is only One Allah. Far is it removed from His Transcendent Majesty that He should have a son. His is all that is in the heavens and all that is in the earth. And Allah is sufficient as Defender.” — Qur’an 4:171
"Christians, as People of the Book, must be warred against and subjugated: “Fight those who believe not in Allah nor the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the Jizya with willing submission, and feel themselves subdued.” — Qur’an 9:29"