Actually you can prove it and it has been proven. Genetics have a minor say in who a person is, and racial factor is equivalent to statistical error. For example there are adopted black children in very white populations, e.g. in Eastern Europe, where I live. These children are absolutely no different to kids here - and the white kids here know from experience that a person that grew up here (among our people) will be just like them. And the same goes for other ethnicities/nationalities that are considered different in personality, e.g. Arabs, Greeks, Italians, Spanish people... It's all about the upbringing.
I am not familiar with any scandals, and in the case of Ivy league schools I am always asking why that school? There are thousands of cheap (for everyone) high quality schools. The fact that few well known schools are using race to distinguish high income students is wrong (now you at least have some view into what racism is, imagine how bad it must be to be a minority), but it is not happening universally as you suggest.
I am not familiar with any scandals, and in the case of Ivy league schools I am always asking why that school? There are thousands of cheap (for everyone) high quality schools. The fact that few well known schools are using race to distinguish high income students is wrong (now you at least have some view into what racism is, imagine how bad it must be to be a minority), but it is not happening universally as you suggest.