He's bothering to bluff to someone who is not even involving themself in the battle, calling them a idiot because they questioned his bluffing.

What a immature lying asshole. *stamps Javis name in hate character list*

And I imagine if the 'necessary parts' were cut off and that worked, the Golem would either stand there or start crumbling on top of the people inside. And unless they know exactly where every single person is (they don't even know where the control room is) I imagine it be difficult to move all of them. Unless it's like heat seeming Lacrima.

But whatever. XD