It's to Saddam's longterm advantage (along with the North Koreans, ChiComs, etc.) to weaken America and one way to do it is for Saddam to give biological weapons to terrorists to spread throughout America.
Done right, it could be catastrophic and leave few, if any, fingerprints as to who did it. Whom then would we retaliate against?
Hopefully, Saddam's days are numbered and he hasn't already planted such weapons in this country.
The idea of leaving this guy alive is insane.
Just how many people does Saddam have to kill before your son-in-law thinks Saddam should be liquidated?