Obi Wan sees Jango face to face on Kamino, and Jango tries to kill Obi Wan. You'd think that would raise an alarm that the clone army may not be all that it seems, considering the prime clone just tried killing a Jedi who serves the Republic in which the clone army was meant to defend. Mace Windu decapitates Jango on Geonosis. Now they know that Jango was in cahoots with the CIS. But no one stops and thinks...huh...Jango's with the Seperatists, but the clones that were made in the likeness of Jango are fighting for the Republic...what the heck?!