Screening for cultural fit is a common strategy by many of these companies - FAANG companies especially. Culture includes morals and the actions you are willing to take or not take to do what is right or wrong. If you've been screened out for cultural fit, it may not be your age or race or other demographic. It may be because you will not be compatible with the value system at the company. Who you hire today dictates what your culture will be in 1-2 years.