>On 28 May, Ms Mitchum emailed Merriam-Webster to point out that racism is "both prejudice combined with social and institutional power. It is a system of advantage based on skin colour".
It is indeed racial discrimination, but it isn't institutional racism. There is a very definite difference between the two. Lots of people on many sides of the issue like to conflate the two when it is convenient, and some are just ignorant of the difference.