Every family has its "thing" MTsman. This is yours.
Since you are not dealing with your authentic parents but rather with the "firewall" the Org has placed around them, dont do or not do anything based on their actions. Do what is best for yourself since you are the authentic functioning person in your relationship with them.
I like all the answers above because they demonstrate that a variety of approaches can be correct.
For me, I always like to think "act dont react"