I'm torn here.
I think the comment was out of line (I'm the daddy of daughters), but the sentiment was not too far off. Chelsea should be off limits unless she enters the arena. She has, so it's ok to comment about her. I think, however, the comment was a little over the top.
Because it was a little over the top, of course, it gives Hillary the opportunity to play a victim card, so she can make the most of it politically--ironically, once again using Chelsea for her own political gain.
I have a bit of a soft spot for the girl...she was a teenager when she was the victim of the most public adultery case ever hit the presses. Her parents put her through hell. That she's not some kind of freakshow a la Underground Panther says something about her character.