re:Is Colonization freedom, then?
One of the reasons space is so enticing to us is because it is a place to explore, to exercize our urge for freedom.
But one thing freedom also means is to be able to return back home.
(This I understood the evening the Berlin wall collapsed: the east-germans wanted a taste of the west but they also returned back home).
A one way trip to Mars is lightyears from our concept of freedom. Especially at the very beginning of its exploration.