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"It is not for the Mushrikoon (polytheists, idolaters, pagans, disbelievers in the Oneness of Allaah), to maintain the Mosques of Allaah (i.e, to pray and worship Allaah therein, to look after their cleanliness and their building, etc.), while they witness against their ownselves of disbelief, The works of such are in vain and in Fire shall they abide." [At-Taubah (9):17]

Narrated Abu Huraira:

While the Prophet was saying something in a gathering, a Bedouin came and asked him, "When would the Hour (Doomsday) take place?" Allah's Apostle continued his talk, so some people said that Allah's Apostle had heard the question, but did not like what that Bedouin had asked. Some of them said that Alllah's Apostle had not heard it. When the Prophet finished his speech, he said, "Where is the questioner, who enquired about the Hour (Doomsday)?" The Bedouin said, "I am here, O Allah's Apostle ." Then the Prophet said, "When honesty is lost, then wait for the Hour (Doomsday)." The Bedouin said, "How will that be lost?" The Prophet said, "When the power or authority comes in the hands of unfit persons, then wait for the Hour (Doomsday.)" [The Book of Knowledge Volume 1, Book 3, Hadeeth 56]