No Muslim belongs inside a Christian church unless it’s to renounce their false god and demon prophet and are asking to be born again/baptized into any Protestant denomination or are asking to baptized a Catholic. Conversely, no Protestant or Catholic has any business being inside a mosque unless it’s with a five-gallon can of gasoline and a highway flare.
Oh, I don’t know: the treatment of the Grand Mosque in Cordoba seems a lot more useful than torching the place would have been.
And as an Orthodox Christian there are a lot of mosques I’d rather like to see returned to their original use as Orthodox churches, rather than go up in flames, and I suspect seizing them and restoring them will involve entering them.