On the surface, the LaVoy Finicum case seems to have a lot of similarities to the Philando Castile case. I suspect the FBI man will claim that he felt threatened and that Finicum did not obey instructions just like the cop who shot Philando did.
Yours is a very uneducated statement, and the two events are nothing like each other. If you watch the tape, you will see that the police/FBI narrative regarding the shooting was a lie. The roadblock was illegally placed and constituted an improper use of deadly force. In addition to this, Lavoy started braking (you can see it in the video) as soon as the roadblock became visible, yet the police started engaging the vehicle.
Because of the illegal use of deadly force by the police, Lavoy actually would have been legally allowed to use deadly force to defend himself and the police lost that right.
The FBI was trying to execute someone in that car regardless of what they did, Lavoy was just the one that drew the short end of the stick.