... In a free society, skeptics are the watchdogs against irrationalism - the consumer advocates of ideas. Debunking is not simply the divestment of bunk; its utility is in offering a better alternative, along with a lesson on how thinking goes wrong.
We want to be open-minded enough to accept radial new ideas when they occasionally come along, but we don't want to be so open-minded that our brains fall out.
The concept of God is generated by a brain designed by evolution to find design in nature (a very recursive idea).
In science, if an idea is not falsifiable, it is not that it is wrong, it is that we cannot determine if it is wrong, and thus it is not even wrong.