They were fraudulent.
Glad to hear you admit that evilution has been inudated with fraud from the beinning, not many will admit to frauds.
Your inital claim was that current textbooks are presenting them as non-fraudulent.
The textbooks that include Haeckle's drawings and premise of each stage of embryonic development depicting evilutionary stages do indeed present them as non-fraudulent by default, simply by their inclusion of them.
Certainly you don't think there are no textbooks that don't include those fraudulent drawings and premise, do you?
With the amount of fraud in evilutionary teaching certainly you can't think that.