Yes, agreed, it’s theirs...and the Church should be ashamed of itself for being unable to keep the parish going and having to sell it in the first place.
That said, I don’t think the sellers realized that it was going to be used as a mosque. Apparently this group posed as a sort welfare and educational organization working with Middle Eastern immigrants. As soon as they got the building, however, they announced that they in turn had sold it for use as a mosque.
Exactly. Attend church and this won’t happen.