not a very good argument, just because everyone believes somthing, doesn't mean that they are right. at one time, everyone believed the earth was flat. does that mean they were right? following your argument, they were. But then, so are the people of today. and so what you must be saying is that the earth was flat at one time but it has now become round? that makes even less sense.
sorry for mocking your argument. i thought it would be funny.