High-skilled migration can be of value but importing criminals, misogynists, religious fanatics, the mentally-ill, the chronically sick, child-abusers, rapists, genocidaires and people who will never contribute more in tax than they receive in benefits seems to be an exercise in stupidity. Can we really afford our virtue-signalling?
It seems he agreed with you @dcbgr. That appears to be one of the reasons he did it - to protest against immigration of the 'wrong kind'.