Thomas – capped 100 times by Wales – claimed to have been targeted for his sexuality following his country’s 74-24 win against Tonga.
South Wales Police subsequently confirmed a 16-year-old boy had admitted assaulting Thomas and would be dealt with through restorative justice at the former player’s request.
“Dear Gareth Thomas. All of French Rugby is with you regarding the homophobic [assault] you’ve been victim of,” Simon tweeted.
“To show our support, the French rugby players will wear a rainbow shoe lace during the France-Fiji game on Saturday night.
“We’re all in with you in this matter.”
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