I think you are entitled to any opinion you like and would defend anybodies right to be different from the rest. But.....if you do want to talk about the subject, then it is very very hard to ignore the tsunami of evidence supporting this 'theory'. Please Google it or do some poking around on the net on the respected scientific websites, arm yourself with facts, keep an open mind, then see what you think.
Don't let anyone tell you what to think, but give yourself the chance of an 'informed' opinion.