Honestly give it a minute for the emotions of it all to settle down. Best I can tell this is an out of control internet rage machine, with very little factual information to back up the claims so far. She’s a world class vocalist who’s a relative unknown for most people, and all we’re currently getting is wild and unproven accusations based on hearsay.
So basically it’s not something she’s ever said, but you’re assuming that she holds the exact beliefs of Scientology. This in spite of the fact she was reportedly raised by a Scientologist, yet is openly gay in contradiction to their teachings. Not to mention her songwriting for Dead Sara, which would indicate other beliefs.
For all we know she left years ago and doesn’t ascribe to any of it. It’s extremely hard to know, and personally I’d like to have some real proof before launching a “righteous” crusade against her.