The good Baron over at Gates of Vienna has some worthwhile suggestions. (HT: Bill Keezer)
My main suggestion is that you vote with your wallet. For example, if your alma mater requests money, tell them, politely but firmly, no dice as long as they support DIE.
('Die' is the singular of 'dice.' Surely DIE is more fitting an acronym that DEI, which, technically speaking, is not an acronym at all, but a mere abbreviation.)
In other news: no self-defense allowed in Canada.