Nothing wrong with it at all.
Instead of banning, try persuading.
I agree with you completely. Unfortunately, the folks supporting Rudy weren't attempting to persuade.
Let's be honest about what really happened here:
1. There was a group of posters who have used vicious and divisive tactics for quite some time.
2. Since these tactics were generally employed in the defense of Pres. Bush, they were allowed.
3. These posters assumed they could use the same tactics to promote Rudy. What they failed to consider is that Rudy is far more liberal than Pres. Bush, and so cover wouldn't be provided for the strongarm tactics.
"Stop your unappeasable single issue voting" is not a persuasive statement. Nor is "you've had your boot on our necks for far too long" intended as a persuasive statement.