Been twice to the service department about my shaking hood and they keep telling me it’s normal. I had them show me another car and that car has to shakes too

and they keep blaming it on the color of car that white stands out more.
Now I got to go on Monday for the third time for the specialist to look at the car.
Here is what I find to be the problem I notice when ever at a stop light the RMP drop to around 600 and that’s when the hood start to have a vibration. I can put the car in drive, press down the E –brake, and as soon as I let go the brake the RPM go up a bit and the hood stop vibrating. However, once you press the brakes the RMP drop and the hood start to vibration again.
Very annoying everything I stop all I see is the reflection of the hood vibrating.