...You realize that the US has had this kind of culture for years and we're still alive right?
Ha. Countries don't just "die". Of course we're still alive - but it doesn't take a nuclear holocaust to destroy us in other ways - the ways that really matter. The fall of the Roman empire is often agreed to be in the 5th century AD. At this point its culture, power and influence had shrunken to such a degree that it could no longer be considered the same political body as the old Roman Empire. Did anyone in 450 AD think to themselves "Well, here we are. Looks like I'm not living in the Roman Empire anymore! I'm a Frank now!"? No, they continued to live their lives and go about things as normal.
It's the same with any other empire, including the US. Our country is dying. Our culture is declining and the dissidence of the population is reaching levels unprecedented since the American Civil War. Will there be another civil war? It's doubtful to me any time in the next 50 years, but a lot can happen in that time. America is slowly ceasing to be a global superpower, and while I doubt there will be a single defining moment in time where that will come into solidity (a nuclear war perhaps would do it, but again, that would be extremely unlikely), things will certainly start to change noticeably for us, and increasingly so over the next decades.
We will continue to go about our lives as we always once did, and nothing will seem wrong to us because it's all we know. What reference point in our lives do we have to determine whether or not we're dying as a nation? History books? Pah, reading is for
fags, right? And the people who do study our history either don't understand its relation to the current day or are too powerless to do anything about it. It's all fine though, the world is ever changing and our happiness does not hinge upon the existence of a meaningless political entity.
Is it really that unreasonable for observer countries to not want this happening to themselves? What started over a century ago in the United States is now happening in Europe. The whole point of studying history is to learn from our mistakes and make sure they don't happen again. Sure, the effects of unchecked mass immigration may not be evident in the short term, and everyone will go happily about their lives as those pesky "right wingers" wave their fists about the end of days and cultural armageddon. Sadly it takes a catastrophic event, or a series of them - as seen in the case of ww2 and the holocaust - for people to wake up. Hopefully people will start caring at some point. Until then we can only wait.