Indifference is not ignoring someone.
Sounds like #detachment - which is so hard for me to distinguish from #apathy.
Years ago I read Awareness: The Perils and Opportunities of Reality by Anthony de Mello, a Jesuit in India.

Mixing Christian spirituality, Buddhist parables, Hindu breathing exercises, and psychological insight ... he cajoles and challenges: We must leave this go-go-go world of illusion and become aware. And this only happens, he insists, by becoming alive to the needs and potential of others, whether at home or in the workplace.

Detachment vs Apathy

In a modern version of his message, therapists say that when others criticize us or unjustly accuse us, we are supposed to adopt the Q-TIP method: Quite Taking It Personally.

If you have a gaslighting narcissist in your social circle, workplace, or family, you'll be accused of horrible things that the accuser is guilty of. NOT TO REACT to it is paramount. They want you to react, to engage, to duke it out. Why is this so hard for me to manage...???

One thing I've learned over and over (because I never learn) is that it is 100% useless to explain, apologize, or defend myself when under attack.

Some things must be passed over in silence.

My husband models this. I need to follow his example. Who needs to know what I really think, anyway? Let them wonder.

We want to help our loved ones who are struggling, but all too often, they don't want our assistance or suggestions.

In my last-century childhood, we respected our elders and listened to the things they'd tell us they had to learn the hard way. Take a shortcut, kid: don't repeat my mistakes. Today, the young all know better than their elders, and they keep trying to reform us, rehabilitate us.

I love the meme going around Facebook on how the day is coming when our children will find out why we save and reuse tinfoil.

My parents survived the Depression and never quit the mindset that we must conserve and be frugal. We, their children, internalized it. But our own children did not. The stuff they throw away! Ok, so people no longer wash and reuse storage bags and foil? Fine. It's not as if I nagged or yelled or whined. But THEY take it personally and ridicule the frugal grandma/mom, then accuse us of being toxic....????
I'm not alone. I found this comment on Facebook:

My mother washes and reuses plastic storage bags! I know someone who very carefully unwraps gifts, folds the wrapping paper and tissue paper to reuse them!!! My grand parents and great grandparents used to talk about life during the depression, they saved and reused everything they could!

And here is where we learn to practice #indifference
Except, these youngsters try to guilt-trip us about climate change and burning fossil fuels, while they leave the water running (unattended faucets), while they do not compost food scraps, while they use up thousands of paper towels per year (the trees! the waste!), while they refuse to use cloth diapers...

#DETACH

Let it go