[Ghoulish Delight]

Let's examine some examples:

Example #1
Claim: "Bush and his administration is at fault for 9/11 because of the failure of intelligence under his administration.
Response: "Much of that intelligence originated under Clinton, who, by the way, failed to take the opportunity to capture Bin Laden when he had it"

Salient response, valid point.

Okay, example #2:
Claim: "The war effort has failed to produce on it's #1 stated goal (at least at the beginning), namely capturing Bin Laden and bringing him to justice. Instead, it's been used as an excuse to incite more war. And worse yet, the person who should be held accountable for these failures has shirked all responsibility and was rewarded with a second term in office.
Response: "Oh yeah, well, Clinton didn't capture Bin Laden either."

Red hering thrown out to distract from the real issue of accountability in this adminsitration.

Subtle difference, but important. And when so much of the Clinton rhetoric has been of the second type, yeah, people get testy when he's brought up repeatedly.