Festus arrives as the new Roman governor, and immediately the Jewish leaders try to influence Festus to bring Paul to Jerusalem. Festus wants to win favor with his new subjects, but Paul appeals to the Roman Emperor. This puts Festus in the awkward position of having to send Paul to Rome for trial when he has no idea of what to accuse Paul. Since Agrippa would have more history with the Jews, he is hoping Agrippa can provide some help.
Legal systems within any nation at any time have both good and bad because they are overseen by people who are flawed. Roman law is protecting Paul from assassination, but also allows him to sit in jail for two years without ever having done anything wrong. We can love our country but should always realize our ultimate defense comes from God. At best, a strong, just nation will only benefit us in life. Our dependence on God protects us for eternity.