CrossWordSalad - slightly odd site you posted a link to. It names some random Muslims it says have spoken at Didsbury mosque but not when. It then lists some random statements - not attributed individually - and claims someone (one of the three named - but which one said which thing?) said them at some point in their life (but not at Didsbury mosque).
No evidence is given for any of these claims, except for a short video clip which is rather traditionalist for my tastes but not actually incitement to anything.
So who exactly said what, and when? And what proof do we have? And do we have any evidence that even if they did say any of this, that Didsbury mosque could reasonably have been expected to have been aware of it before inviting them?
None of this is answered. The site clearly has an axe to grind but it seems far from 'proof' of any wrongdoing by anyone, let alone Didsbury mosque.
On the other hand, an old friend of mine who lives near the mosque visited it last week (she's not Muslim, and didn't wear a headscarf) and she said they were lovely and really welcoming, even though they must all be starving given it's Ramadan and given they must be very busy dealing with all the press attention and harrassment since the attacks.