If I hand your mother a poisoned coffee and assure her its a normal coffee, bully her into drinking it, don't let her into society until I see that cup is empty, and she dies, then I am no murderer. She should have known that it could have been poisoned. She should not have trusted me. Her trust in me meant that she tried to kill herself, clearly. You should think about what you did to her that made her want to die. She must have been super depressed for her to end her own life like that. Not my fault at all.

This is essentially your reasoning buddy. Stop legitimising murder. These people are murderers. Sure, he should have done more thorough research. Research which they are supressing an censoring at every turn. Because they are murderers. They are not merely assisting peoples suicide. There is no suicide involved. Suicide requires a degree of intent. Just because you're gullible doesn't mean you want to die, nor should it make someone poisoning you blameless.