As far as I could discern from his strange behaviour his problem was that he wants Orlando to be viewed as a purely homophobic attack
He was in a state of classic Leftist cognitive dissonance because he felt incredible grief and anger but at the same time could not bring himself to blame the problem of Islamist ideology. The reference to the Bataclan really tipped him over the edge as he his brain was going "this has nothing to do with Islam and therefore nothing to do with the Bataclan". He was much happier to accept the reference to the Admiral Duncan pub bombing
This is exactly what happened. One can see why he got so frustrated. We see this all the time on here, even feminists, drop the stance when faced with sexism in Islam, they cant cope with it and would always drop the principle they like to think they hold when faced with it I have seen posters do it on here.
I have seen posters argue and argue for pages about stances on feminism, but when Boys are chosen to do something, they don't question it or bother with it - if Islam says its so, suddenly its perfectly understandable and OK
it beggars belief.