The 14th amendment makes sure states cannot create unequal laws that all U.S Citizens enjoy. What is legal in one state when it's a protected right in the U.S Constitution must be legal in all 50 states or those laws are not equal laws and infringe on the rights of certain citizens
A rifle with a high-powered scope and laser sight was found in Casteel's hotel room on the 12th floor, overlooking the crowded Ohio Street Beach.
chicago.cbslocal.com
Wrong.
There are no civil rights ‘violations’ here – 14th Amendment or otherwise.
From your own linked article:
“Prosecutors said Casteel admitted owning the guns, but he does not have a Firearm Owners Identification card, which is required to legally possess a gun in Illinois.”
The requirement of a license or permit to possess a firearm is perfectly lawful and Constitutional, in no manner in ‘violation’ of the Second Amendment.
The 14th Amendment doesn’t require all state laws to be ‘equal’ or ‘the same,’ it requires the states and local jurisdictions to afford all persons residing in the states equal protection of state laws and due process of the law.
An example of a 14th Amendment violation would be if the state refused to allow someone to apply for a FOID because of his race, religion, or national origin.
But that’s not the case here – Casteel wasn’t denied a FOID because of who he is, he was lawfully arrested because he didn’t have the document at all.