Unless their congregations were in danger of falling into doctrines of Islam, or had fallen into them but now were repudiating it, I must most respectfully beg to disagree with you about whether this is appropriate for churches to do. It isn’t Christianity which goes out to pick fights that are peripheral to salvation of souls. You have to look to certain other religions for that.
The time will come, Brother or Sister Christian, when we will be faced with the reality of this: that our fight for freedom and our fight to defend the Judeo-Christian ethic are one and the same. It is a hard pill for an increasingly secular and very pampered society to swallow.