I can go along with much of what you say, but to condemn all Christians on the basis of this unthinking woman is unfair - not a representative selection, even if perhaps true in your experience.
When my DH died last November a very (otherwise) nice woman commented when she first saw me in January and had commented on my absence from our art history classes,
“Oh dear, I expect that cast a bit of a shadow over Christmas then”
??? I was a bit at a loss as to how to react.
But in my experience, the true friends are the ones who are still concerned for you 6 months, 12 months or even afterwards.
Those first weeks are awful, but so is later when the world has continued to spin and everybody is getting on with their lives.
Except you.
Every sympathy on your loss 