If aliens really strike will it be America that saves the World like in the movies?

No, we will build a wall.

Maybe America is always the one saving the day because America makes all the big films? Have you wondered why American film lore is full of lone cowboys riding into town and shooting up the bad guys, why they make so many films about their country under attack and a lone hero saving the day, why they seemed to be the only army fighting the Nazi's in in WW2? That's how they see themselves and they are just reinforcing their own mythology.

pft..the religious types will probably get us all killed starting crap with the aliens before that happens.

Nope the Russians will because they have the weapons.

There’s a meme on Facebook that says, “When aliens go by Earth they lock their doors.” I don’t think aliens would even bother with the world, since we’re doing such a good job of destroying ourselves.

I think that America is more the one who makes tension in all countries, than it will save the world.

yes, hopefully it will be like that if it really happened, but I hope that won't happen