The real objectives of such sites and authors is not to actually educate or provide facts, data, verifiable data, but to convey a message, in a subtle but sarcastic way, most people will not bother to actually click and verify the hyperlinks, but will just read the initial paragraph.
The message conveyed is in the headlines and in first paragraph.
" so sacred that lower castes (more than 75% of modern Hindus) weren’t even allowed to listen to it being recited."
He provides NO data, facts, to support this claim, but wants the readers to actually believe this.