Most sinologists are too isolated in their field of study to have a decent grasp of this study. Every Asiatic culture with a martial art claims to have invented it, but the evidence against that is tremendous.
Aryan culture is indicated as emerging from India, not founding it. The myth of Aryan origins for India has been strongly dispelled.
The Vajra is not a weapon that is employed by any current taiji practitioners. It is not even a Chinese weapon originally. The presence of techniques for the weapon in CMA is something that sinology seems to ignore outright.
The problem is that nationalism blinds people. They stop their study at invisible borders and then claim the are specialist experts because of the narrow focus of their study, but they are like a person trying to assemble a big picture by only using the pieces that are their favorite color, while excluding all other pieces.
One thing that I have not shared, is that I do not spend most of my time online and have a rather good book collection. None of my understanding about the origin of Taiji is based on online study. And frankly the Chinese cannot even accurately translate their old works, there is much controversy about the meaning of ancient characters. The evidences I have strike me as incontrovertible and I don't really care how much people make fun of me for having an educated opinion that indicates the current consensus is delusional.
The funny thing is that Fu-Xi was not Chinese!
When he lived: China did not exist. China is not a geographic location, nor a people, nor a single culture. It is a nation, and nationalism has no place in true study.
And yes, Tao goes back to him, the creator of the Bagua. His cultural identity is a fascinating topic. Every ancient culture tells of him and gives a different name for him, most claim him as of their so called "race". However in nearly every case, the people who are experts at the mythology of their culture are totally or largely ignorant of the mythology of other cultures, thus they never even get a chance to see the bigger picture. Moreover most are not compelled to, if you tell them something they do not seek to confirm it, they just tend to take it on faith. However when I researched the consensus to confirm it, I found a lot more information, due to the global scope of my study.
I have many of Dr. Yangs books that mention this topic, as well as books by other researchers. I am aware of Dr. Yangs beliefs about the matter. He is among the best researchers in the field, despite the narrowness of his study, which is limited almost entirely to China, and thus does not even have an opportunity to learn more about the origins of taiji, as that the farther back you go the more nationalism will hinder your research.
For example, LaoTzu went to India from the area we call China now, and Bodhidharma went from India to the area we call China now. When limited by sinological constraints the specialist has no way to explore past the border and culture that they have chosen to limit their study too. Thus there is information about both Lao Tzu and Bodhidharma in India, that the sinologist remains totally ignorant of.
However the problem is identical in India! The arts do not originate there. However all of the postures of Taiji, Xin-yi and Bagua-Zhang are present in Indian art that is far older than the Shaolin temple. The Indian experts are just as ignorant as the China experts when it comes to the origin of their arts, and so claim it to be a original creation of their national identity, despite their own history contradicting this the same way it does in China!
I actually use a vajra in some of my training. I know more about the function and history of this weapon than most who are familiar with it. Needless to say, it's origin goes back far before India comes to exist. It is not an Indian weapon in origin.
I laugh when someone thinks I am deluded here. Many people never listen or consider, rather they do not care what is said, like proud fools they only care who said it, for some the messenger is the only thing that matters and the message is never received.
I pity the person who rejects the consideration of truth out of the belief that they already have the truth. If you do this with my words, it is not my loss, it is yours.