I've been involved in many conversations with people in other countries looking at these issues. If you're asking why it is expanding, these are some of the more interesting questions: Why doesn't it happen in any of the Asian countries because of the values and perspective they have there? Why was it recently overturned in Slovenia? Why did the Scottish Parliament object? Why have we seen the chaos in the British discussions over this issue?
It's a values question. Fundamentally, you either support suicide prevention and helping your citizens live, heal and recover, or you don't.
I'm sorry. I have little more to offer than that.