This is a new development as the previous official line has been that the situation is strained but under control.
[1]: http://www.dn.se/nyheter/politik/morgan-johansson-gransen-fo...
[2]: http://www.gp.se/nyheter/sverige/1.2887462-minister-boenden-...
edit:spelling
It isn't reasonable to expect Turkey and Lebanon to take all refugees from Syria for example.
Also the responsibility of airlines for paying the costs of returning anyone who is not allowed to enter a country should be removed. It is a very hard-line rule that creates a lot of unnecessary suffering and also creates a huge black market (trafficking). [1]
Sweden is free to do what they want, just like other countries can decide their own foreign policy.
I'm not saying I support building walls at the border, but again, countries are free to do what they want with their territory, they don't owe anything to refugees or other nations.