The Paris court ruled that Onana's writings violated France's laws prohibiting genocide denial and incitement to hatred, noting that France would "no longer be a haven for denialists".
Tayebwa had posted pictures of his wife Anita Rukundo, son Timothy Rubandamayonza together with Manchester United legends Sir Alex Ferguson and Jonny Evans while he waxed lyrical about United's new coach Reuben Amorim and Andre Onana's clean sheet slate.
Charles Onana, 60, author of "Rwanda: The Truth about Operation Turquoise" published in 2019, faces charges of denial and minimising of the Rwanda genocide.
The head of the Ashanti kingdom - Otumfuo Nana Osei Tutu II - occupies a powerful position in society and it is considered hugely disrespectful to openly insult or criticise him.