LAS VEGAS — A federal appeals court has ruled that a U.S. deportation law that fueled family separations at the southern border is “neutral as to race,” striking down an unprecedented Nevada ruling that had determined it was racist and unconstitutional.The 9th Circuit Court of Appeals made that determination Monday in its long-awaited decision on the law known as Section 1326, which makes it a crime to unlawfully return to the U.S. after deportation, removal or denied entry.The ruling is a blow for …