all 3? or just the big 3? because there are more than 3. Old school Catholics and most historians agree jesus was a real person, Old school Jews believe that jesus was a real person but not their savior not sure who their prophet was, the Prophet Muhammad was real because he fought in the crusades I'm pretty sure. Bhudda (sp) was a real person if i'm not mistaken as well. That's all i really know, can't say for Hindus because i don't know enough about their religion. Mormons believe that john smith i think was his name, well ok he was a real person but the business about some stones is ridiculous. Scientologists believe Zenu (i think is the name) is some real alien guy who does some weird stuff, but really the cult is just a scam
Since when are there only 3 religions? Did the world recently undergo massive religious slaughter/ethnic cleansing? Where have I been? I MUST stop taking such long naps.
There is actually very little evidence of Jesus Christ. Most of the accounts were written so long after he died that who knows how accurate they are? Perhaps he never existed. As for the other prophets, we don't really know much. Could be real, could be fabricated. We'll never know.