Hi OP,
I completely understand you. My parents want to build back a connection with me as well despite my father being a narcissist and my mother finding excuses for my physically + emotionally + neglectful step father. And I too find it very hard to remind myself to stay emotionally distant.
Firstly, people tend to expect abused children to forgive their parents after their parents ask for forgiveness and love, so there is a social pressure. Secondly, as children it is hard for us to look away when our parents are in pain and cry for help...despite how much they have hurt us, it is hard to not feel sad when we see them suffering. Lastly, I think we still have an unconscious desire for the parental love and acceptance...we may try to convince ourselves that our love can change them and only we can change them thus we have a responsibility of changing them and helping them to be happy.
However, all of those are invalid reasons and incorrect reasoning for us to put our mental and physical well-being behind the needs of our abusers. Firstly, our abusers are grown adults (i think at least in most cases? if not call CPS), and they should be responsible for what they have done. And ending up with a child who chooses not to love them and care for them is honestly a very fair consequence of their actions. Moreover, even if you seriously want to help your parents despite not needing to, you need to make sure you are in a position where you can handle all the stresses of dealing with your parents healthily first before stepping into the game. You need to make sure you are happy and stable enough to not get drowned by your parents' suffering before helping them, or else you will just add yourself to the suffering instead of managing to help anyone. I have done this stupid deed before, my action did not end up helping anyone, it did not change my abusers, it only temporally made them happier, and most importantly it almost drowned me... So I really hope the OP won't repeat the same mistake of putting our abusers' needs before that of our own.
Best of luck OP. You have a very kind heart, but please don't allow your abusers (or anyone) taking advantage of your kindness.
HelloWorld314