Up yours!
The point, of course, is to not validate, by answering, the stupid question.
This can be done in more or less polite ways.
You might say, politely, "Your question rests on a presupposition that I reject, namely, that the DEI agenda is a good thing. Now move along and have a nice day."
Yesterday I received a solicitation for funds from an alma mater. I wrote back, "I am in a position to make a substantial contribution, and will do so, but only on condition that you publicly renounce the DEI agenda and return to the true purposes of the university."