Usage notes

The terms Mohammedan'' and ''Mohammedanism'' have been largely replaced by ''Muslim'' and ''Islam'' since the 1950s, and are now considered offensive, though some authors continue to use ''Mohammedanism'' as a technical term for the religious system (of Islam) as opposed to the theological concept of that exists within that system. The terms are said to be offensive because they suggest that a human being is central to Muslims' religion, and/or because they parallel the formation Christian, Christianity and thus supposedly equate Muhammad and Christ.Kenneth G. Wilson, ''The Columbia Guide to Standard American English (ISBN 0231069898), page 291: Muhammadan and Mohammedan are based on the name of the prophet Mohammed, and both are considered offensive.