Because, if there is a change in the logo you haven't even seen it yet, so to just come out and say you feel so strongly about something you haven't even seen yet, is...well...reactionary. For all you know there might a new logo out there, that might just make you happy. But because you've taken such a stand and proclaimed such strong feelings you'll never give a new one a fair shot.
Think about it this way, if it was a different logo from the beginning of the franchise, and now it came time to change it, you'd probably have the same opinion you do now. So it probably has nothing really to do with the artwork itself, just that you can't seem to stomach the idea of changing it.