“The dangerous suggestion that all fears are equal.”
I think you are confusing fear itself with the agent causing the fear. My (perception of) fear of X and your (perception of) fear of Y are more alike than not, because we are human with human emotions. It doesn’t imply X and Y are ‘equal’ (whatever that means) or ‘rational’ at all. But the reaction to X and Y has a commonality that we should appreciate to help us understand each other. You may fear approaching war, while I fear spiders. One is ‘rational’, one not. The two are hardly equal. Yet the emotion is quite similar. Our (perception of) fear are in some sense equal, but the source of the fear is not.