A landmass and a continent: which bit of bloody great chunks of rock, soil, stuff etc are you having problems with?
You can do what you like but the continental plate it was performed on wont give a fuck. You could even destroy that continental plate or even the whole shebang but it will still not give a fuck.
Landmasses and continents don't give a fuck - they really don't.
In any case, humans had been living here for several thousand years before Columbus arrived 500 years ago. Is it so difficult to see a distinction between millions of people with hundreds of years of history and thousands of people arriving on ships?
How on earth can you describe a landmass as stolen or a continent as usurped?