The courts aren't doing him any special favours. They're simply respecting his constitutional rights, and I don't see how they can be criticised for so doing.
There's a disconnect happening here that I can tell is surprising the non-US folks here. The US posters are not being crabby and hostile because his constitutional rights are being respected. They are being so hostile and vindictive because it's the FIRST TIME those rights were ever respected. It's so unheard of that I suspect most of us didn't even realize it was a right. We're living in a society where the guards got off scott free after they boiled an inmate alive for fun. Where a kid spent years in maximum security hellhole prison before even making it to trial. Our baseline prison conditions are very likely illegal in your countries even before factoring in overcrowding, sadistic/negligent staff, and legalized slavery.
That's the accepted reality of the situation. ...and here this privileged rich white fuck gets transferred so he can have a special diet for his flaky make-it-up-as-he-goes religious stance.
People are also not being hostile to alternative religions or shamanism itself. Dude is very obviously making it up as he goes and slapping a trendy label on it to sound cool. He's disrespecting the gods his tattoos represent, he's disrespecting the christian god he continually calls on, he's disrespecting actual shamans, he's disrespecting the vast numbers of people with legitimate dietary related beliefs who don't get special treatment due to not being a rich white treason celebrity.
We're enraged watching this shit head get pandered to as something special. We're losing our collective minds watching another violent insurrectionist get approval to go on vacation to Mexico. We're having fits because NO ONE who is not a rich white republican gets this kind of special treatment.
YES, the system needs to be improved. YES, we want it improved. YES, this kind of thing should be the baseline. But we're raging because it is NOT the baseline, and in fact the law ONLY protects rich white republicans in this matter.