"Where is the logic of man made continents? So just because we say that river over there is the start of a new continent does that make it true?"

Yes.

"Going by the true definition of the word a continent shouldn't be dictated by humans, but by facts, separating America into North and South is beyond stupid, same as Afro-Eurasia, this is a tool used to separate and segregate mankind into thinking that people that live in other "continents" are different from them."

con·ti·nent
   /ˈkɒntnənt/ Show Spelled[kon-tn-uhnt] Show IPA
noun
1.
one of the main landmasses of the globe, usually reckoned as seven in number (Europe, Asia, Africa, North America, South America, Australia, and Antarctica).
2.
a comparable landmass on another planet.
3.
the mainland, as distinguished from islands or peninsulas.
4.
the Continent, the mainland of Europe, as distinguished from the British Isles.
5.
a continuous tract or extent, as of land.

Source: http://dictionary.reference.com/browse/continent

"News flash: Americans = all citizens born in the continent of America."

America isn't a continent.

Source: http://www.merriam-webster.com/dictionary/america

"Also we are all citizens of this planet so the sooner you stop thinking you are superior to everyone else and deserve special threatment the better."

When did I ever say I was superior to anyone? When did I ask for any special treatment? There really isn't any reason to get personal.