It sounds like the author is suggesting that Canada abandon any thoughts about rejecting anyone who comes from any of several countries, no matter how unsavory they may be.

This is ludicrous! Almost all Canadians would agree that anyone who can't survive the incredibly low threshold to stay here should be deported. That said, where else can you send them other than where they came from?

Canada has the right to deport undesirables and simply must do so.

We do not want people from any country thinking we will allow them in no matter who they are and have no ability to deport them no matter what they do once they are here.