Performing Jumu'ah Salah in a church
Q: Due to space restriction in an existing Masjid, is it permissible for Muslims to perform Jum'ah Salah in a church on the basis that some brothers argue that the whole earth is a Masjid and provided that any items pertaining to shirk are covered, there is no problem in performing Salah in a church? If it is not permissible please advise why with Shar'i evidences so that the matter can be addressed with the proofs in front of us?