Not all that stupid. If Saddam's control is gone, you'll see the populace go after the fedayeen and the Ba'athists and the other surviving members of Saddam's regime. For example, Uday isn't really a well-liked guy without the fear and the power to hand out goodies or decide life and death. And, I'm sure there are some who have grudges against Chemical Ali. The list goes on and on and on. We don't know everyone who has benefited from their positions, but the locals do.
This is stupid! That's like saying "...if they kill Saddam we will rise up against him..."
Maybe, but here is what I have thought for a while: Iraq will be more difficult than Afghanistan was, but once the Iraqi government falls, it will have fallen for good. IMHO, a year from now we may still be mopping up in Afghanistan, but Iraq will be completely over. Maybe I'm right and maybe I'm wrong. But isn't this a bit similar to what the Iraqi in question is saying.
Ah, chill out. It's not stupid. They don't have the means to overthrow these tyrants on their own. They're saying they will not tolerate staying under the yoke of another oppressor if we lift it from their shoulders.