But no right to a particular platform to do so.
of course.
Complaining that their free speech is infringed because someone has declined to let them use a particular platform is a bit ridiculous.
agreed.
They also don't have the right to have their message, or even the act of proselytisation, welcomed.
again!
I'd prefer not to see it at a cinema I've paid to attend
Me too. But that goes for 100% of the other ads too. and you can complain.
Well strawberry the law is very clear that lack of belief is equally deserving of respect and protection as religious belief.
yes. So that means they can't advertise?
Religious people absolutely do not have the right to use non-religious property or institutions to promote religious belief.
who said they had a right to use? You are objecting to them buying advertising space, like every other organization can. I am not questioning the cinema's business decision - that's their business, and one I like. But it doesn't sound like that's what you are saying.
What happens if the british humanist association were to take out a similar ad (i.e. one selling their message)? Should we entertain cries from Christians that they were offended?