How can we deal with the coming Underpopulation disaster?

For years, birthrates in Western countries have been sub-replacement fertility (and barely replacement in the US). This goes back about 40 years. At the same time, the Muslims (who already hate us, which is a result of 50+ years of foolish foreign policy) have very strong fertility rates. Might the Muslims decide to invade some Western countries and engage in nation-building about 50 years from now? Or might they just decide to conquer us and create a World Islamic Government? The Muslims are going to run Europe in a few decades, as a result of Europe's underpopulation. Even if the Muslims don't invade, underpopulation could severely harm our economy. If you think outsourcing is a problem now, wait until there are alot fewer American workers in a few years when the Baby Boomers retire. How are going to deal with Underpopulation in order to prevent Western Civilization from being wiped out?

Public Comments

1. Buy stock in companies involved in the growth overseas.
2. The global population is currently at a whopping 6 BILLION. At the rate at which our resources are being depleted, the last thing we should do is scramble to make more babies just so we can outnumber the Muslims.
3. The Muslims have already invaded and plan to have control of our country by 2020. The problem is that first world countries were aware of over-population and planned accordingly. The third world keeps overpopulating and expects us to finance it. Russia just gave their workers the day off to make babies...
4. Bang like the wind!
5. As controversial as it may sound, you can look at populations in America that are increasing in birth-rate. And that is the illegal aliens. What do we do? Make them all legal, and let them pay taxes for the benefits they are getting. Bang - you kill 2 birds with one stone. First, you do not have illegal aliens anymore. Second, you have a new source of tax revenue to support the baby-boomers. Think about it.
6. We can pay Americans to have children via tax credits . Congress could pass a joint-resolution which would ask each American family to have at least 5 kids each .