I informed my parents who are the hospital they would be moving to facilities. My dad who has Dementia will be going to memory care. My mother who has COPD and has been bed ridden for several years to a nursing home. They are very angry at me so my time was short with them. I need a respite from this for a few days. It is bad to take that time while they settle into their new places.
Your Dad has dementia, which robs him of his abiity to use reason and logic, and stops him from being able to have empathy for others (like you). Your Mom... the odds are she will get over her anger. Make sure you have your boundaries clearly identified with them and defend them confidently.
Kudos to you, and wishing you peace in your heart.
I have learned with my own parents and their dementia, that their anger is part of the process of absorbing the news and the change. And that you will likely get most of their anger, unfortunately. It's not specifically you they are mad at--they are mad at getting old, dementia, COPD, their health in general, and that they are different than they used to be.
They will get used to the idea eventually. Give it time. Frankly it may be easier on both you and your parents to be away even while they settle in.
I promise you that you are doing the right thing by giving them 24 hours of the care that they need. They will be in good hands.