Saying so does not make it so...this is what you might "believe" but the facts say otherwise.
The Church is the 'body of believers', past present and future, united through and by the Spirit of God with Jesus as it's head....it is not a building of 'institutionalized religion'. Faith rests on the Person of Jesus Christ not a institutionalized church or denomination.
Islam has also existed for hundreds of years...years do not confirm anything other than duration.....and a following that remains brainwashed by it's leadership to believe what they dictate.
Further the catholic church does NOT faithfully teach the teachings of Christ....it teaches catholicism and globalism which rests on the teachings of men and traditions, misusing scriptures to support their teachings rather than let their teachings reflect the scripture and determine their doctrines.
As recent evidenced of the catholic church shipwrecking it's membership by the leadership....and of which countless examples throughout history will attest....
God tells us that ...."the sacrifices of pagans are offered to demons, not to God, and..." I do not want you to be participants with demons". .....You cannot drink the cup of the Lord and the cup of demons too; you cannot have a part in both the Lords table and the table of demons. (I Cor 10:20)
The Vatican City spokesman recently described this shared prayer between the Pope and the Head Imam as a gesture of inter-religious 'Harmony' and a 'joint' moment of silent adoration of God.
Let me remind you that God tells us ..."What 'harmony 'is there between Christ and Belial? Or what does a believer have in common with an unbeliever?....Of which he then instructs, clearly so,....."Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?" (2nd Cor. 6)
Ouch.
For those with eyes to see and ears to hear.
Those without will rationalize, deflect, and excuse.