Jim picks and chooses who he makes fun of. I don't think it's for optics, I think he sticks with stuff that he personally finds funny and with JF, Warski's LOTR stream, etc., he probably just found it more sad than funny or didn't think he could make fun of it well. See, the Terry Davis video where he left out a lot of embarrassing information about Terry because he felt bad for him. Jim's not a attack dog. He's just a guy who streams on things he personally finds funny.
Basically, Jim does what Jim does, when Jim does it.
By the way, I have no real reason to beleive this whatsoever, but I suspect Jim is a government employee or works tangentially with government employees. His coof streams were really consistent when many state governments were internally buzzing about Corona virus and dried up when the lockdowns were in "maintenance mode."