An organization can’t outwardly support it because that would be a legal nightmare once participants get hurt or die as a direct result of it. They may also struggle to get events sanctioned by the jurisdictions that they’re hosting the events in.
That said, there are plenty that turn a blind eye to it as best they can, as others have pointed out.
That’s exactly what it is yeah. 22 years (or 20 for the boy) before they’ll be eligible for parole. If they’re deemed to still be a risk to the public then they won’t be released.
The UK doesn’t do life sentences with no eligibility for parole. Every sentence will include eligibility for parole, with the maximum period for eligibility being around 25 years. But obviously there are still plenty of prisoners who don’t get parole and spend their entire life behind bars.