Is it any wonder? The Catholic Church says you all serve the same god.
CCC841 The Church's relationship with the Muslims. "The plan of salvation also includes those who acknowledge the Creator, in the first place amongst whom are the Muslims; these profess to hold the faith of Abraham, and together with us they adore the one, merciful God, mankind's judge on the last day.
Would you say you serve the same god as the Muslims? It looks like that is the official position of the Catholic Church.
Of course we do. How many gods do you think there are?
Catholic, Muslim, Jews, Protestants, Atheists, all serve One God, for there is no other. You need to be Catholic not to serve a Catholic God, but to serve the One God with cooperation of your will.
Thou shalt love the Lord thy God with thy whole heart, and with thy whole soul, and with all thy strength, and with all thy mind (Luke 10:27)