@spendius,
Oh--I forgot--you haven't offered any scientific proof that America exists. Surely you have noticed the similarities between the services, ceremonies, rituals, dogmas and mantras associated with a belief that America exists and those surrounding the belief that God exists.
Some people believe that wives and husbands exist and there is no scientific proof for those either. The law recognises the categories for convenience just as America and God are conveniences.
What atheists need to do, instead of continually attacking beliefs whilst complaining about politicians employing negative ads, is set out a way forward in the absence of all beliefs which, by definition, have no scientific grounding. If they would do that they might be taken more seriously.
I have a few years experience as a demolition contractor and I know how much easier it is to knock structures down than it is to replace them.
Atheists have been at it for a very long time and they are saying exactly the same simple things they were saying at the beginning. So there's obviously no evolution involved in their position except that evolution which proceeds at the pace Darwin describes.