You underestimate them. They were secure in their own faith and never needed to bash others' faiths.
Remember we had priests, vicars and reverends in the KSA ministering to the Christian expatriates. The Saudi government allowed them to come under the name of "special teachers" because the foreign Christians would have it no other way. Holy men from other faiths were OFFICIALLY not allowed in the KSA, so the Saudi government called them "special teachers. It was NO big deal for the Saudis.
My Saudi boss allowed me to go to Sunday morning Mass and make up the time at lunch. Sunday was a work day. My Catholic co-worker from India is the one who VEHEMENTLY objected to my taking off the 20 minutes to go across the street to Mass. No church, just a VERY large room for our "church." The KSA hired THOUSANDS of Catholic Filippinos and they consitututed the bulk of Catholics in the KSA.
And, since my boss thought "God is number one. There is always time for God. CloudMountain (not my real name of course) can go to pray whenever she wants" I started going to DAILY MASS, a habit I still have TODAY.
THANK YOU, Mohammad Hussein, for encouraging me to "go to pray."
God TRULY works in mysterious ways.