Your logic is completely flawed. Consider the following:

1. The White American cannot be racist to a White police officer. They are of the same race.

2. This is a hypothetical situation with no context. In real life, if a police man pins someone to the ground, black white or otherwise in America, nobody screams racist straight away. The accusations usually follows a perceived injustice.

3. Calling someone a racist does not make you racist. It means you're levelling false accusations. The world 'racist' has a specific meaning which is linked to an institutionalised power structure... not just name calling.

4. (probably the most important one) It is not illegal, and there is nothing wrong with being or living in a high crime area. The police does not have the right to treat you any differently depending on where you live.

I suggest researching more about the word 'racism' and what it truly means.