When they first mentioned that the bulk of the layoffs would take place after "Performance Management" assessments, everyone's internal alerts should be going off. Deloitte has a long and sordid history of "cooking" performance reviews. Search for Deloitte and "forced rankings".
It's not what you know and how productive you are. Also, honesty, integrity and character (along with skill and productivity) count for exactly squat compared to 'boot licking' and s—ing up to management fads of the day. The little boy who points out that the king is wearing no clothes gets drawn, quartered and executed.
Keep your head down, your mouth shut and pray during these times.