Erm, yea, I'd say so.

If you don't recognize and call out dogwhistles then it makes it easier for chuds to hide in plain sight. It should not be easy for them. They should not be able to hide. They should be called out, named, shamed, and overall be met with the persecution they wish on marginalized groups that they target.

If you believe in such things, it's a moral imperative to make their lives more difficult, and knowing their dogwhistles is an important part of that.