First let your friend repent, then forgive him, give him a placard to hold in the Cathedral. Isŕaelis are our friends. I know they love us. But not all believe in friendships with Jews and Christians.
Its better to serve the LORD with humble bowing rather than straight pride, for pride goes before fall.
Similarly, its at best to forgive others’ betrayal of trust and wilful sins. I pray The Lord bring real friends and believers into our lives, have mercy on our sincere friends. In Jesus Name we pray. Amen