You can make a thread stating that minority strictly means 'lesser in numbers' and pat yourself on the back, but definitions have different connotations, and even if you had the most rudimentary understanding of sociology you'd know that minority is most likely 'lesser in power' in sociological terms, despite what your boy Webster is saying.
Apply that to 'racism'. You are correct, it can be labeled institutional racism, but that doesn't negate the fact that 'institutional racism' is often understood to be simply 'racism' in sociological terms.