I was doing a little reading for church history and came across this nugget from Vatican II. Perhaps you’ve already seen this:
16. Finally, those who have not yet received the gospel are related in various ways to the People of God…the plan of salvation also includes those who acknowledge the Creator. In the first place among these there are the Moslems, who, professing to hold the faith of Abraham, along with us adore the one and merciful God, who on the last day will judge mankind. Nor is God Himself far distant from those who in shadows and images seek the unknown God, for it is He who gives to all men life and breath and every other gift (cf. Acts 17:25-28), and who as Savior wills that all men be saved (cf. 1 Tim 2:4).
Those also can attain to everlasting salvation who through no fault of their own do not know the gospel of Christ or His Church, yet sincerely seek God and, moved by grace, strive by their deeds to do His will as it is know to them through the dictates of conscience. Nor does divine Providence deny the help necessary for salvation to those who, without blame on their part, have not yet arrived at an explicit knowledge of God, but who strive to live a good life, thanks to His grace. Whatever goodness or truth is found among them is looked upon by the Church as a preparation for the gospel. She regards such qualities as given by Him who enlightens all men so that they may finally have life.”
This leaves me with two thoughts: Muslims worship the same God? And Catholics wonder why fervor for evangelism is so obviously missing?