No. Apostasy is the complete repudiation of Christianity.
So if you were to sign public docuмents that declare Muslims worship the same god as Catholics and that the Muslim god will judge mankind on the last day
would that mean you repudiated Christianity?
Would that mean you left the Catholic Church or would you still be a member in good standing?
To be clear, here is the quote from Lumen Gentium:
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."
Could you or I sign that and still be IN the Catholic Church?
Could we still hold an office IN the Catholic Church?
To deny one dogma is to reject Christ and His Church is it not??