Christian cross can be very generic and so can the Islamic crescent...you don't need the star... if you check out Islamic flag you see crescent in all shapes and form with and with out stars..
I thought the Islamic counterpart of the Red Cross is the Green Cresent. Islamic nations will not permit the Red Cross in because even if we have forgotten the original meaning of the cross, they haven't. And the cresent is loaded with Islam, in this country and elsewhere.
Is everyone blind? The design includes a clear star formed by a collection of carefully planted trees right where you would expect it to be.
I'll bet that the Tower of Voices which is made up of forty aluminum wind chimes and surrounded by a set of concentric semicircular "resonating rings" will sound strangely like the resonate echoing calls to Islamic payer from a minaret. And golly gee, what a coincidence that will be.