Technically no religion is 'the right one'. All of todays mainstream religions evolved out of older, earlier Pagan religions. Hell, even the Christian/Jewish/Muslim God evolved out of the earlier Caananite god El. And yes, those are the same God as all three religions have a shared belief route.
But anyway.. point being... Before the mainstream religions there was the Egyptian belief system, and even earlier the Pagan worship of the 'mother nature figure'.
Really if any religion is 'the right one', it'll be one of the pagan ones as these existed for millennia before the mainstream ones of today.
But really the whole 'Its right because its what I believe' argument seems to be the only point people ever seem to use for arguing that there religion is 'the right one'. They don't use facts, or history, or any solid evidence of the truth of it... It all just boils down to belief and how that belief has been courrupted down the years by man to fit his purposes.
Take Islam... that says both suicide and murder make you a non-muslim and you will go to hell in the Qu'ran... yet, you still have members of it preaching Ji'had and becoming suicide bombers because its what they believe, even when its plainly written as fact that they are wrong.