I don't think we need anymore multicultural anything.
What we need is to accept that we can be different and do our own thing--we don't need "centers" to merge faiths with clear differences.
If I recall, the backers of this disgrace have already said they are putting an "interfaith" component as part of the final plan, so I guess the planners of the mosque are already thinking along these lines.
Sometimes the right answer is just "No." No "But as a consolation prize" caving to the multiculti foolishness, which has nothing to do with respecting real differences but is about turning all beliefs into one big, mushy Oprah-esque We All REALLY Believe The Same Things When You Get Right Down To It foolishness.