The entire concept of national borders is stupid.
Putler also doesn't believe Russia's borders end anywhere.
It plays the human race against each other as a lottery of where you born, as if there isn't enough inequality in the world.
The entire point of a state that governs itself with the consent of its citizens is advancement of the interests of the citizens of that state. It isn't fighting global inequality or advancing the interests of those in other states at the expense of their own.
And congrats on emphasising my point. The Spanish external border wasn't breached. 0 people reached the EU Schengen zone, and yet Italy decided due to the risk of those immigrants they suspended the Schengen agreement with Spain. Let me repeat using different words. Brown people outside the EU moved to somewhere outside else still outside the EU, and Italy decided to close an internal EU border, all to rile up a racist base who also doesn't like brown people - With this context do you understand what "nationalistic" means?
Unconstrained immigration is almost always a bad idea. It leads to failed integration, ghettoization, prejudice and resentment. This issue is turbo charging the rise of right wing politics throughout Europe.