C. K. Raju has made some outrageous criticisms of the traditional take on Euclid in particular and Western history in general. Yet he has a book published on the subject with an apparently respectable publisher in India. Have modern historians of the classical period responded to his critique?
Note. One of the responders mentioned a helpful review by Ferreiros here.
We can see:
Regarding specifically the possibility that Euclid "the man" was a forgery is totally irrelevant: we know quite nothing about him, but we have "the book": Elements, and its value does not change if it was written by someone else (but in any case by some ancient Greek: we have testimonies...).
If the Elements has been "falsified", this fact does not change of a iota the meaning of its content: the theorems. It is not the same thing as saying that the Holy Bible has not been written by some ancient prophets and in reality is a late Hellenistic forgery.
Regarding in general the approach to history (and history of science as well), my humble opinion is that history is like any other science: conjectures and hypotheses are fundamental, and new insight and a fresh point of view can be useful and necessary, but there is a golden rule: all must be checked with facts.