I think this refers to an exchange with me.

I have been told that I am not entitled to an opinion unless I can back that opinion up with facts.

You were told no such thing.

Of course everyone can have an opinion on anything.

What I told you was that you can not expect it to get serious consideration if it is not based on any actual knowledge.

Your opinion was that mainstream media, and specifically BBC, play a bigger role in radicalising people to join IS than the internet.

Much has been said and written about the problem of radicalisation, but that notion is unique to you Dave.