They would be alive, so the answer is Yes.

You know, the world was once divided in two between Portugal and Spain. True story.

Why is that? The Aztecs for example had technology of their own (math, astronomy, medicine, hydraulic engineering), their own culture (civil, military and religious institutions) and their ethics.

They even had a method of farming known as chinampa that had almost zero impact on the environment (something modern civilization hasn't been able to achieve completely). These were civilizations not just semi-nomad tribes.

Virgin soil epidemic. I like how I make a big post addressing myths dealing with the subject, and people go on posting the myths :(

The aztec empire was not the small, disjointed tribes the English found in North America. Only reason the English and later the U.S. managed to take so much land is because they never found united resistance, and when they did, it was rushed federations that fell apart quite easily. 

Nah, dude, my hypothetical Aztec empire is much better than a bunch of tribes. 

I always though it was bullshit, but even i was a little scared because i weren't so sure if it was bullshit or truth that day, but it ended up being just another day.

in short: it was just the time when the Mayan calender system run out, it was the end of their calender and some people interpreteted it as the end of the world. That it did happen before and they would just begin a new calendar cycle. Actually the Mayans even predicted things that would happen millions of years from now, so predicting the end of the world before that would have not made much sense anyway. 

You can't commit a genocide when most people die of natural causes (smallpox) and when there are lots of people in America with "latino" genes. You can't say the same of USA/Canada, but it seems that the Spaniards and the Portuguese are the killers here. A hint, we Spaniards are Caucasian, not "latinos", taking into  consideration that the word latino is used in a wrong way in USA.

Learn some history before spreading bullshit.

So you guys think you never slaughtered native Americans, never stole their riches and brought them back to your country?

No, learn to read. What I'm saying is that it isn't one of the biggest genocide in human history. That's bullshit, plain and clear, but coming from you what I could have expected. Every conqueror does bad things, but it's tiresome to see that when someone thinks of slaughters, people think in Spaniards in America. There have been tons of much bigger slaughters than what Spaniards and Portuguese did, but they aren't remembered every time people talk about conquers. Imagine what would have happened to native Americans if UK/USA would have conquered Mexico, Central and South America. They would have been treated in a much worse way, decimating them, keeping them in reserves and letting them make casinos.

A worse slaughter is what Muslims do in every place they conquer, but is something politically incorrect to say.