During a Monday appearance on The E&G Podcast, DeMario -- who competed for Rachel on Season 13 of The Bachelorette but got the boot when he was accused of having a girlfriend back home -- insisted that Rachel is "attracted to white men" and he had predicted from the start of the season there would be "a black representative" in her Final 4 for the purpose of being politically correct.
Rachel fired back at DeMario by posting a comment underneath a photo on the podcast's official Instagram account that was promoting the bachelor's appearance.
"Says the guy that dated Lexi," Rachel wrote, referencing DeMario's alleged ex, Lexi Thexton, who is a white woman. "Demario never knew me and still doesn't."
DeMario told The E&G Podcast of Rachel, "From the beginning you knew that she was attracted to white men. You knew that. No disrespect, you just knew. She had that vibe."
"From Night 1, we all sat down -- all the guys and I said, 'They're going to have a black representative, either myself or [Eric Bigger], and they're going to have [Dean Unglert], [Peter Kraus], and [Bryan Abasolo] as the Final 4.' We all caught that. I mean, it was obvious," he added.
Rachel ultimately selected Bryan, a chiropractor from Miami, as her winning bachelor at the end of her journey to find love on the August 7 finale, and he in turn proposed marriage. Peter finished in second place, Eric placed third, and Dean claimed fourth place.
Eric was the only black man in Rachel's Final 4 suitors.
"I said, 'It's either going to be myself or Eric' [in the Final 4]. Just for the fact that I feel like Eric and I both have... I mean we have different but similar personalities and we're both like, it's just pretty good for TV," DeMario said on the podcast.
"It's either me the wild and crazy black guy, or it's going to be the very spiritual down to earth positive motivating guy. [And] you have Dean because he's f-cking drop-dead gorgeous. Dean's beautiful as f-ck."
DeMario, however, only lasted on The Bachelorette for two weeks because Lexi showed up on a group date in Los Angeles claiming to be the girlfriend he had left high and dry at home, with no explanation or warning, in order to appear on the show. Lexi had accused DeMario of being a cheater and a liar on The Bachelorette.
DeMario pretended like he had never even seen Lexi before when Rachel confronted him about his past, but Lexi told Rachel that DeMario had the keys to her apartment and the pair had been involved for about six months.
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On The Bachelorette: After the Final Rose, DeMario continued to downplay the significance of his relationship with Lexi, painting her as a "side chick" and occasional hookup.
"Lexi was a girl I really just strictly knew from Bumble. I couldn't tell you what she did. I knew she went to Santa Monica College, she's from Vancouver. I don't know if she's trying to be an actress, I don't know if she's trying to get into any of that," DeMario told The E&G.
"To be honest, I don't know too much about her. If I'm being 100 percent honest, when I came out and was like, 'Oh who is this?' I sh-t you not, I only saw her two times in the day time."
After his stint on The Bachelorette, DeMario traveled to Mexico to film Bachelor in Paradise's fourth season.
However, production shut down after several days of filming because a producer filed an allegation of misconduct in regards to a drunken sexual encounter between DeMario and Corinne Olympios. The situation worsened when Corinne released a public statement calling herself "a victim."
Warner Bros. therefore investigated the incident for nearly two weeks but found no evidence of wrongdoing or sexual assault, so taping resumed, but neither DeMario or Corinne returned to Paradise.