Following on a number of entries on Islam, and the need to have constructive dialogue, it is also important to not forget the grave theological problems and errors that Islam presents vis-a-vis Christianity. From the Catholic Encyclopedia:
The torments of hell and the pleasures of Paradise, but especially the latter, are proverbially crass and sensual. Hell is divided into seven regions: Jahannam, reserved for faithless Mohammedans; Laza, for the Jews; Al-Hutama, for the Christians; Al-Sair, for the Sabians; Al-Saqar, for the Magians; Al-Jahim, for idolaters; Al-Hawiyat, for hypocrites. As to the torments of hell, it is believed that the damned will dwell amid pestilential winds and in scalding water, and in the shadow of a black smoke. Draughts of boiling water will be forced down their throats. They will be dragged by the scalp, flung into the fire, wrapped in garments of flame, and beaten with iron maces. When their skins are well burned, other skins will be given them for their greater torture. While the damnation of all infidels will be hopeless and eternal, the Moslems, who, though holding the true religion, have been guilty of heinous sins, will be delivered from hell after expiating their crimes.
The joys and glories of Paradise are as fantastic and sensual as the lascivious Arabian mind could possibly imagine. "As plenty of water is one of the greatest additions to the delights of the Bedouin Arab, the Koran often speaks of the rivers of Paradise as a principal ornament thereof; some of these streams flow with water, some with wine and others with honey, besides many other lesser springs and fountains, whose pebbles are rubies and emeralds, while their earth consists of camphor, their beds of musk, and their sides of saffron. But all these glories will be eclipsed by the resplendent and ravishing girls, or houris, of Paradise, the enjoyment of whose company will be the principal felicity of the faithful. These maidens are created not of clay, as in the case of mortal women, but of pure musk, and free from all natural impurities, defects, and inconveniences. They will be beautiful and modest and secluded from public view in pavilions of hollow pearls. The pleasures of Paradise will be so overwhelming that God will give to everyone the potentialities of a hundred individuals. To each individuals a large mansion will be assigned, and the very meanest will have at his disposal at least 80,000 servants and seventy-two wives of the girls of Paradise. While eating they will be waited on by 300 attendants, the food being served in dishes of gold, whereof 300 shall be set before him at once, containing each a different kind of food, and an inexhaustible supply of wine and liquors. The magnificence of the garments and gems is conformable to the delicacy of their diet. For they will be clothed in the richest silks and brocades, and adorned with bracelets of gold and silver, and crowns set with pearls, and will make use of silken carpets, couches, pillows, etc., and in order that they may enjoy all these pleasures, God will grant them perpetual youth, beauty, and vigour. Music and singing will also be ravishing and everlasting" (Wollaston, "Muhammed, His Life and Doctrines").