Are you going to be "shaken," or are you gonna go looking for blood?
I think I would feel like a fool for supporting an impotent god.
And don't think this strategy hasn't been used by Muslims already. Many mosques are built on the foundations of what were the holy sites of other religions. And they did that to make a point.
And it worked.
The middle east used to full of small religions similar to Judaism. Where are they now? The decendents of those believers are now praying to Allah.
70 million Hindus were decimated when Allah's armies of death rode in. All those Muslim Pakistanis you see today were forcibly converted hundreds of years ago from Hinduism.