Do you think that assisting the suicide of someone who wants to die - and has requested - is morally equivalent to allowing them to die by withholding medical assistance (assuming that the level of suffering turns out to be identical in both cases)?

Yes, I am convinced that assisting the suicide is equal to contributing to someone’s death. Actually, a desire to give up living is linked to a mental disorder. That means that a person needs a doctor’s assistance. Depression that is the cause of suicide is a serious disorder that requires a professional treatment. In such cases, we should do our best to help a person to overcome psychological problems, give some sedatives but not support him in his efforts. After medical treatment everything will seem to him much more positive.