Church bells are not necessarily a call to prayer. Church bells have rung out for centuries for various reasons. And bells themselves certainly have many purposes. The sound of a bell is common, traditional, and unoffensive.
Islamic call to prayer has only one purpose and whereas they may say it has not caused a problem in other places, how do they know that? How many individuals are stressed and scared by that sound? I certainly don’t want to hear it where I am. Call to prayer could be considered incitement in countries who are working to fight terrorism.
Further, if call to prayer ever came to my area, I would arrange for church bells to ring all over the city to drown out the sound.
For Muslims to say there has been no problem is just more taqiyya.