The most favorable interpretation of his situation is just apathy. When you're in the circles he's in, you really can only go with the flow and embrace the "just let people enjoy things" mentality, or judge-not-lest-ye-be-judged. It's a lot like furries. They take all kinds. You're all beating off to animal people, do you really have space to say gay furries or transgender furries is one bridge too far?
Similar to furries, the furries have issues with cubfurs, but it's not really because of what it is in and of itself. It's that the people who are into cub are violently unlikable. Furries not into cub couldn't just begrudgingly tolerate them because they're very in your face about it and won't let you just ignore them. So they ended up getting excluded from a lot of furry spaces. (A lesson to be learned by the Kani Krew if they want to keep enjoying things without everyone else kicking their shit in.)
What does Jim gain by pissing off the lolicons? Well, he'd piss off his own fans, which is something he'd say he would never do under any circumstances multiple times. In particular, die hard psychotics who are currently sperging about me everywhere would start sperging about him. He was doxed but nobody did anything with that information, not even Ralph. Right now he lives in peace and quiet. This would be Jim's driveway after saying lolicons are pedophiles.
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Not a lot of fun when you apparently have developed boneitus and your ribs are just snapping from basic activities.
He also invites scrutiny. Right now, he only looks hypocritical to a-logs, not his paypigs. If he says anything bad about lolicon, his own fans start getting to point our perceived hypocrisies. Just off the top of my head, he has openly advertised Pippa for years and she's a loli avatar. If he mentions some show and there's a canonically 12-year-old character that gets buttraped or something, per Japaense tradition, he'd look hypocritical. And you can't really avoid that. You would have to be extremely careful about what shows you talk about, because if you just watch anime you will eventually see schoolgirls being raped. There's a lot of rape and a lot of schoolgirls in anime. It's inevitable.
So from his perspective it makes no sense whatsoever to even touch the issue. His fans are happy to uncritically embrace him as a fellow weeb and financially reward him for it. Pissing a big chunk of them off either which way is just bad news. He either defends it and pisses off the moralfags or he shuns it and pisses off the fucking lunatics who lose their shit over it.