I didn't take it as being insistence. I thought he was just sorta "asking for his own peace of mind" kinda thing. There are different interpretations of it, I just felt like he realized at that point that the only way for his family to be taken care of was for him to die. If he stays alive he spends his life in jail and can't help his family.
But, those few lines have always confused me, can you explain to me why you think he was insisting??