Good. I don't care if it's a police car or someone's personal car or an empty cardboard box. If you're throwing around molotov cocktails you should go to jail.
To be fair though, even if you think people should go to jail for that (and I don't think that's an unreasonable view), surely you'd agree that a life sentence is excessive?
A life sentence is excessive yes, but why are we trying to justify throwing molotiv cocktails in the first place? What happened to civility?
I agree that they should have jail time, but life in prison after not actually harming anyone physically? That's authoritarian and exactly what I was replying to in OP's comment.
What if the car exploded, hurting people nearby? What if there was a police canine in the vehicle that wasn't see, or someone crouching on the other side of the car out of sight? Throwing a molotov cocktail into a vehicle, in my opinion, should be charged as attempted manslaughter.