Not nearly the same. Not even the same. At best/worst, Dearborn is just a city full of muslims. Mecca is the qibla, the mandatory direction of prayer. Mecca is the destination for obligatory pilgrimage for any muslim wishing a pathway to paradise. Mecca is the one place where heaven touches earth, the inviolable place.

All Allah's mojo is invested in Mecca. If Mecca gets nuked and goes a-glo in the dark, Allah's mojo is a no-show and the place is a no-go. Islamists pile into a puddle of suicidal despair.