They're not trying to kill your mom. That may be the effect, but it's not the intent. They're trying to have their kids not be autistic. (You can claim that the evidence doesn't support that as a possibility. But it's still what their intent is.)

That's like saying "I'm trying to make it dark by turning on the lights." You can;'t make excuses for them by saying that, even though they are recklessly endangering other lives, they're doing it under pretenses that are false, so it's ok.

I mean, people who attempt to pray away disease instead of seeking proper care has potentially good intent. But that doesn't make them any less negligent when their child dies as a result.

There’s a research paper out there where people who were prayed for had worse clinical outcomes then the control group.

Someone shooting a gun randomly in the middle of a busy shopping mall might honestly claim they just wanted to hear a loud bang - yet there is no reasonable way to say their actions won't kill someone. Therefore they are trying to kill someone despite their stated intention.