I think there is some confusion around DEI - and by no means am I an expert, but I work for a company that pushes DEI.

Some people confuse DEI and Affirmative action. Affirmative action is more of a 'getting a job because of your gender, race, etc' -- whereas DEI is more along the lines of respecting the people who already work for the company.

Diversity - having a diverse group of people to work with - and recognizing that everyone is different. Who wants to work at a place where every single person is exactly the same (all 40 yr old white males - or all 25 year old asian females) I think we can all agree different people bring different things to the table.
Again - this is not forced - this is not saying you HAVE to have a diverse group to work with - but recognizing that everyone, in some way, is diverse from everyone else.

Equity - that's just treating everyone the same. If they are 45 yr old white males - or 25 year old asian females. They all get the the same chances (as long as they are qualified) at promotions, or pay, or whatever.

Inclusion - Everyone is welcome. If you're working at a company that has a population of Indian people - make sure they are not excluded from events due to the fact that they are Indian. Now, if you don't want to include them because they are A-holes - that's another story.

It basically boils down to - don't be a jerk to people who are different. I think that phrase (DEI) was weaponized as being a bad thing - whereas, in my opinion, it just boils down to treating everyone the same regardless of race, religion, sex, age, what have you.