That is quite literally a national socialist perspective of someone who is okay with only having socialism in her or his own country while the rest of the world is not important. I'm not against the market, I'm saying if you are, too, and you don't like the way the market works at the moment (poor people come to rich countries), stop fighting the symptoms (migration) and do something about the causes (poverty, conflict, often, but not always, caused by the richer countries). It's actually quite interesting to see how the proponents of free market capitalism are usually the first ones to cry for artificial market restrictions such as closed borders, high tariffs or laws that help the creation of monopolies and oligopolies...
If capitalism really were such a win-win situation with oh so much trickle down, then the poorer countries, which mostly are capitalist now, should grow and grow and grow. Instead they send more and more poor people to the richer countreis, why is that if we're helping them grow so well? Shouldn't they be happily optimistic?
And the caveat with the perfect free market (multiple competing participants on the supply and demand side) is that it is not stable. The government has to stabilize it and if you remove all the supports in the name of freedom, it will come crashing down on you sooner or later.
Bookmarks