Well, at least we could stop any Saudi money financing mosques or schools in our countries until the Saudis reciprocate, i.e. allow the building of houses of worship in their country. Unless they grant equal rights to all citizens regardless of religion, they shall not promote their religion in our countries.
This is what they preach in Saudi schools:
This is tit for tat, one of the most basic principles of sound human relations of every kind.