Pi-Sudoku said:
If i am not mistaken the koran tells muslims to provide money for the sick and the less fortumate.
To spend money building a mosque contradicts this and so goes against Islam.
i suppose this is true of most religions
I believe that you don't understand the concept of "Zakat" or Charity in Islam. Yes Islam does teach to give to the poor, and the less fortunate, but in no terms does it say not to spend money on your needs such as food, shelter, or other legitimate worldly things.
I don't know if I am right but the Shariah, the Islamic Law, has ascribed a value of 2.5% of your total income or something like that for Charity. So basically you are only obligated to that 2.5%, unless there is some situation which makes you liable to pay. But otherwise it is only the 2.5%. All the other money which you give in charity is basically topping on the cake, putting more good deeds into your account with God. So to spend money building a mosque is not going against the religion of Islam, infact spending towards such things is encouraged in the Quran, the Muslim Holy Scripture.
"It is not righteousness that ye turn your faces towards east or west. But it is righteousness to believe in God and the Last Day, and the Angels, and the Book, and the Messengers; to spend of your substances, out of love for Him, for your kin, for orphans, for the needy, for the wayfarer, for those who ask, and for the ransom of slaves; to be steadfast in prayer, and practise regularly charity; to fulfill the contracts which ye have made; and to be firm and patient, in pain (or sufferings) and adversity and throughout all periods of panic. Such are the people of truth the God-fearing".
So you see that "to spend of your substances, out of love for Him" is encouraged in Islam, and building a mosque would fall in this category.
I hope this clears up the misunderstanding, and answers your question.
Peace be unto you