Taken another way
It is a commenting on how white men were the only people who could be treated unfairly
-Only ones who can be sacked with impunity
-ones that are pushed out when things get tough (which is rubbish)
And now finally they are allowed to join the 'protected' groups and not be treated worse than everyone else the whole time
I don't think it says what you think it says
The white men at my old work who were always moaning about how they are the most oppressed group in the workplace (ha!) would like it