I don't disagree, but what do you base this claim on?
The Coran and the Bible.
Mohammed was a good prophet, but when Muslims took the Coran, and made it the official Government manifesto, interestingly, all this stuff about making Islam the only religion and warfare came up. The imperialist government use this to manipulate the people. This was not the original Coran.
Christianity was a good thing, there were hundreds of scriptures about Jesus. But then, came the Romans, made it official, and all the stuff about "only Christians go to heaven and the rest go to hell" appeared.
Everytime a religion is mixed up with a government, the holly scriptures are mysteriously changed to fit the political agenda of the government.