I think a quote (from the Messy Church website) has been slightly mis represented by a PP. The full quote is ...
"But the mystery (and annoying thing and huge relief all at the same time) is that we could do all that work and do it brilliantly but it would STILL be a waste of time, fruitless, rootless and heartless unless Christ is the reason for doing it, the means of doing it and his glory the outcome of doing it."
So, it's not saying that it is rootless and heartless if people go to messy church if Christ is not the reason for THEM choosing to go - but that the Messy Church event should be built up by church leaders with Christ being the reason for it. They shouldn't do all the work of catering for people, tidying up messy events etc if Christ is not the reason for THEM doing it. I think this is very different.
Of course there will be an element of Christianity as it is Messy Church and not an event in the church hall with the word Church not in the title. Again very different things.
Churches are often now full on community hubs offering way more than a Sunday service; think food banks, clothes banks, lunches and dinners etc. and special family events that are often free. I think it would be a real shame if Churches did close as I know of many in my local area that are hugely supportive of families. If some of these families choose to turn to Christianity as a result of attending the free events then that can surely be a good thing if it is what they are choosing to do. If you don't believe in Church, messy or otherwise then that's absolutely fine. I do worry though that some people often think that Churches have a terrible hidden agenda and are very negative about it when actually it could be something rather wonderful. We all have a choice.