hy christians are fighting each others

I am very much concerned and even more interested to know why we who call ourselves christians, are fighting each others.
My point is that we should not let our different denominations confussed us, whatever you call your denomination Baptist, Methodist, pentecostal, we are all one body in christ, Our leader Jesus Christ never discreminate any body or condem me or you for preaching his words, it was He who called us all to go out and preach the good news, weather you are an apostlic church goer or a Jehovah witness just go out there and spread the good news.
I was on a bus one sunday morning coming home from work, when a guy in the same bus started to preached the word, he was doing good in his preaching when a church goer enter the bus started to cry the guy down until the bus driver has to asked them out of the bus.
Do any one think the the guy has the right to behaved the way he did.
let me hear from you all please.
Jim