Why Was Mifsud Not Charged for Lying

Why was Mifsud not charged for lying three times to the FBI?

Why were only those associated with Trump charged with lying to the FBI?

Did the FBI target Trump associates with the intention to entrap them?

The entire affair originated with the mysterious Mifsud trying to catch George Papadopoulos in a honey trap, but no one asked why? Who was Mifsud working for?