Why does the federal government make laws they do not want states to enforce? Example Illegal immigrations?

[osryd]

You haven't considered the size of the problem and the resources that would be needed to get every illegal alien out of the country.

[egan]

In the beginning, federal laws and state laws were completely separate. You had federal rights and powers defined in federal laws and you had state rights and powers defined in state laws.

As some point the division became blurred as Congress muscled its way into state laws by way of "commerce clause" and "due process" among other things. For example, it wasn't until the US Supreme Court ruled in 2010 that the Second Amendment was applied to limit state laws from restricting firearms.

However, there are still certain areas of federal law that the states "agreed" to delegate exclusively to the feds, including international relations. One example is Arizona's "trespass" law, which has nothing to do with immigration policy. It merely allows a police officer to arrest a person for "trespassing" in Arizona if they are "undocumented aliens" in violation of existing federal laws.

[adare]

A better example is patent infringement. There is not one state that devotes ANY resources to enforcing patents. Still, you asked why congress would pass such a law. Probably because it wanted patents to be protected.

[dureau]

Cause our federal government is corrupt commie shitbags.

If you want to secure the boarder you'll have to gather your friends and do it yourself.