"Now ...accept the fact that the Bible has been tampered with..why are you so bothered about it?"

Oh I agree that the Bible has been tampered with - even more so than what you site here. The issue isn't "Are there changed versions." The issue is can we piece together (from the overwhelming amount of manuscript evidence, Fragments, Quotes, etc...) an accurate representation of what the original manuscripts (which aren't in existence) say. The answer is a resounding yes. In fact, the more manuscripts, fragments, quotes, variations, etc.. that we have in our possession actually makes it easier to work backwards to the Original texts.

This is extremely well known amongst Ancient Textual critics. But you don't want to be bothered with them. You stick to your radio shows and podcasts.