This seems a bold statement. Why would you assume people getting vaccines who had this happened all had it happen because of COVID? Secondly, "cytokine storm" is a phenomenon that was known before COVID, it doesn't require COVID in any way. How would you know immune problems can't occur from the vaccine? Don't think you can.

The only way to say COVID caused the cytokine storm, as you are, is to have done a test on these individuals to see if they had gotten COVID then.