His concern in that case is that her reasoning for supporting the ban on nunchucks is evidence of an over-permissiveness toward bans and toward the restriction of, presumably, Second Amendment rights. Basically, that she's liberal in her interpretation of the validity of banning weapons.
The whole thing is just theater at this point. She's getting confirmed, so it behooves conservative lawmakers to bait her into replies that make for helpful soundbites in 2010 and 2012. E.g., "President Obama and the liberal congress want to take away your right to defend yourself. (cue Sotomayor clip out of context defending restrictions on nunchucks)." You get the idea. Really, since they can't block the confirmation, the ideal tactic is to slow it down to try to milk her responses for the shrillest or most potentially frightful responses. They know, as do liberal and centrist lawmakers, that one a justice is confirmed, 90% of America will never hear about them again.
It's just interesting that what happened today was about nunchucks.
Cowabunga.
