Observing the innovation of the Prophet's birthday opens the door to other kinds of bid'ah and being distracted by them from the Sunnah.Hence you find that the innovators are very active when it comes to bid'ah and very lazy when it comes to the Sunnah; they hate it and regard those who follow it as enemies, until their entire religion is innovated anniversaries and Mawlids.They have split into various groups, each of which commemorates the anniversary of its imaam's birth, such as the births of al-Badawi, Ibn 'Arabi, al-Dasooqi and al-Shaadhili.