There is more historical documentation for Jesus than for the founder of any other major religion.
The scriptures of Buddha, who lived in the 6th century B.C. were not put into writing until after the Christian era. Muhammad, lived from 570 until 632 AD, but his biography was not written until a hundred years after his death.
The first accounts of Christ were written within a few years of His death and resurrection. Non believing writers such as Josephus, the Talmud, Tacitus and Pliny the Younger all give independent evidence of His birth, life, death and spread of the Christian belief.