TORONTO - A Toronto mosque is telling Muslims not to say "Happy Thanksgiving" or invite friends into their homes for turkey dinner on the holiday weekend. The Khalid Bin Al-Walid Mosque says to "avoid participating" in dinners, parties or greetings on Thanksgiving because it is a kuffaar, or non-Muslim, celebration. A two-part article on the mosque Web site says Muslims should also "stay completely away" from "Halloween trick-and treat nonsense," Christmas, New Year's, anniversaries, birthdays and Earth Day. "How can we bring ourselves to congratulate or wish people well for their disobedience to Allah? Thus expressions such as:Happy Thanksgiving, Happy...