The the attack on Trump was not the question. It was the accusations made by Kelly leading to the question. If all other candidates were set up with accusations and then followed up with a question then it might be fair. Trump was singled out by Kelly and the Fox team who screened all the questions. Trump was set up in the first debate and Trump had no reason to believe he would not be setup again in the final debate. Rather than play defence with Fox he decided to go on offence.
1. There were no "accusations" made by Kelly leading to the question. There were facts laid down as a predicate which were acknowledged by Trump to be true. That is not an allegation.
2. It is true that Kelly said the following:
"Mr. Trump, one of the things people love about you is you speak your mind and you don't use a politician's filter. "
Is that the "accusation" to which you are referring?
How many ways have Trump supporters on this thread alone tried but failed to make Megan Kelly wrong so that Donald Trump can be right? A pattern we have seen repeated daily since he announced his candidacy with virtually anyone with the ill luck to stand in Trump's path to power?
As I recall she asked the question and comments prior to in a very snarky manner and had that look she gets on her face kind of a smirk that says I got you on this one.