Republican Andy Martin started birtherism, not Hillary or her supporters.

[SunSeeker]

4. All your link says is Free Republic bloggers brought up unsourced rumors in early 2008.

But Andy Martin was out there questioning Obama’s "hetitage"since 2004, and feeding it directly to Free Republic, as the cited OP articles document.

As Chris Hayes wrote about Martin in 2007:

Within a few days of Martin’s press conference, the conservative site Free Republic had picked it up, attracting a long comment thread, but after that small blip the specious “questions” about Obama’s background disappeared. Then, in the fall of 2006, as word got out that Obama was considering a presidential run, murmurs on the Internet resumed. In October a conservative blog called Infidel Bloggers Alliance reposted the Andy Martin press release under the title “Is Barack Obama Lying About His Life Story?”

https://www.thenation.com/article/new-right-wing-smear-machine/