The Supreme Court doesn't make law.
The law in this country comes from the CONSTITUTION. The CONSTITUTION does not explicitly state that the States have no control over immigration policy. The Constitution DOES explicitly state what rights they give up to the Federal government. So the lack of such language forbids ANY Federal body - be it judicial, legislative or executive - from taking those rights away from the state. THAT IS HOW AMERICA'S GOVERNMENT IS SUPPOSE TO WORK.
For example, Florida should be able to decide how they handle Cuban's showing up on their shores, or how to handle Hattian refugees. I see no reason why the opinion of the Federal Government (or, more specifically, the opinion of a Senator from Massachusetts or a Congressman from California) is superior to that of the Florida house.