This is a bold statement. Dacian was used in Antiquity and still is used as the name of a distinct people with a distinct culture. The relations between various North Thracian tribes: Dacians, Getae and Moesians are unclear and it is posibile that Dacians and Getae were two names for the same tribe or two different, but closely related tribes.
Also, I have to point that romantic notions about Dacians, either as works of art, or under the guise of the pseudo-science of thracology, were embraced by other Romanians before and after Ceausescu and his national-communist protochronism and they are a part of romanian nationalism.
For example: Eminescu and the other romantics wrote many poems about them in the 19th century, Lucian Blaga wrote a play Zamolxis, A Pagan Mystery in 1921.
Mircea Eliade published in exile his studies De Zalmoxis