@KC ...
"Now, ought my parents to have agreed with me, or at least say that they did, to stop my depression? Should Leelah's parents have agreed, or at least said that they did?"
I know where you want me to go with this. I'm not sure that I'm going there but I hope this satisfies your questions. Bear with me.
Suicide is rarely sudden. The change between when I began contemplating suicide and when I halfheartedly attempted suicide was pretty easy to see. A few people did, but they didn't speak up until after the fact. Had I killed myself, I imagine that they would have felt immense guilt for the rest of their lives knowing that they could have done something about it but didn't because they were afraid to speak up about something so severe and be wrong.
It's understandable, too. Had someone said something, I would have been put on a watch list or entered into a psychiatric evaluation program or something of that nature. It would have made my life a living hell - the key word, of course, being "living."
I disagree with that line of thinking, though. My life was already a living hell, so much so that I attempted to end it. It wouldn't have been possible to do any more significant damage than had already been done had someone spoken up and pushed my family or those close to me to get me help.
As such, I'm going to answer the first half of your question - no. It is not necessary to agree. What is necessary is respect, love, and care. That's the reason I'm still here - my condition and how I felt about my life, privileged as I've been and overreacting to a number of minor disturbances in my daily life as I was, I was respected, loved, and cared for, be it by the doctors that talked me through everything, my parents who stood by me and never once blamed me, and my friends, who, when I saw them again after a week away, hugged me and consoled me and made me feel like I was surrounded by people who care. And I was.
You have no idea how many times I have cried myself to sleep out of pure happiness that I'm still alive.
When my friend Maggie committed suicide a couple of years ago, I cried for her too, and I still do, because I wish I had been around her enough to see it. At her funeral, her parents apologized for not recognizing how dire her situation was, and, while they acknowledged that they didn't agree with her solution, they wish they had simply found it within themselves to do what any parent should do - offer unconditional love through thick and thin and make sure everything turns out okay. I feel for them because it's not their fault, but it's something that they will take to their own graves someday.
In Leelah's instance, I see it as something very simple - her parents locked her up and abused her. You acknowledged that, given the full factual case, she was abused, and this is not hard to acknowledge. When you imprison someone in their own home, a home which they hate, and do not allow them help for their depression, you are abusing them. What is more terrifying to me about this case is that her parents used the fact that they did not agree with her life choices to justify the abuse. They used it as a reason to continue - by showing her how wrong she was, they thought, she would be the kind of person that they wanted her to be. As a result, she's dead.
As before, no, her parents were under no obligation to agree with her. I know a number of parents who do not agree with their child's decision to come out as something different, be it sexuality, gender, or something so simple as going to the rival school that the entire family has rooted against every Saturday for 30 years. Yet, through all of this, I have never met a parent that went anywhere near the lengths that Leelah's parents went in order to wreck her life, nor have I ever met anyone who would go so far as to attempt to destroy everything someone else believes in by torturing them. Leelah didn't receive the respect, love, or care that she needed to pull through, and Leelah will never know that it truly does get better and that someday she would have found a home and found herself, just as we all do. That's her parents' fault.