There is an excellent eyewitness account of Monday's events at the Oxford Union here. Also some very interesting comments/discussion.
From the point of view of a defender of free speech, I find it dismaying that so many commentators apparently cannot distinguish between free speech as an inviolable principle, and the merits of the issues being discussed. Surely, whether or not a view is mistaken, obnoxious, or downright wicked is irrelevant so long as it is not advocating coercive violence against others.
In my view, those who maintain that free speech should be limited to the expressions of opinions they agree with, or do not consider harmful, are clueless as to its actual nature. It is always the 'hard cases' - the racists, the Holocaust deniers, even the defenders of paedophilia - who put the free speech principle to the test. Those who would ban or prevent the peaceful expression of such mistaken views because they believe they will do harm by seducing the unsophisticated are themselves the enemies of free speech, democracy, and an open society, as was quite clear at Oxford on Monday night.