Some context for you. His opinion is far more nuanced than you give him credit for.
and
I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance. That is my religion, and every day I am sorely, grossly, heinously and deeply offended, wounded, mortified and injured by a thousand different blasphemies against it. When the fundamental canons of truth, honesty, compassion and decency are hourly assaulted by fatuous bishops, pompous, illiberal and ignorant priests, politicians and prelates, sanctimonious censors, self-appointed moralists and busy-bodies, what recourse of ancient laws have I? None whatever. Nor would I ask for any. For unlike these blistering imbeciles my belief in my religion is strong and I know that lies will always fail and indecency and intolerance will always perish.
“Trefusis Blasphemes” radio broadcast, as published in Paperweight (1993)
Focusing on his accent (it’s not received pronunciation) may be something you are doing for the sake of argument, but I would ask you to instead do some research into his background. The bigotry and hatred he draws experience from and which he criticises, the educated, cogent, impassioned and erudite fashion in which he constructs his criticism.
I would encourage you to listen to the following debate, which captures some of his criticism.
That’s the 2 hour version, for some reason it doesn’t appear on the IQ2 official channel (or at least I can’t find it). Here’s a shorter version if you don’t want to spend a gripping and interesting two hours watching the full debate.
https://www.youtube.com/watch?v=kwP4C5hjo4Y
Your circular argument notwithstanding, he is not merely criticising religiously motivated people taking offence, he is criticising their belief that their taking offence in some way affords them the right to intercede in other people’s lives. Which they routinely do.
Of course, no true religious person ever treated anyone else unfairly, never attacked any people, physically or verbally, never perpetuated racism and homophobia and bigotry, so I must admit I’m obviously confused and fighting against my own delusions. No true religious person was ever bigoted, so what am I really to argue against?