Osundairo Brothers Say They're Skeptical of Jussie Smollett Entering Rehab

Jussie Smollett's timing to enter rehab is peculiar ... at least according to the Osundairo brothers, whose testimony was critical in convincing a jury to convict him. Abimbola "Bola" and Olabinjo "Ola" Osundairo tell TMZ ... if Jussie really had a…