What not to say to someone who's had or having a meltdown.

Don't be a dick to folks who are sick

No dogma needed.

Please for the love of all that's holy, do not throw your religious beliefs at someone who's having mental issues.  Especially if they're having a panic attack or SPD meltdown. 

Just don't.

Not everyone believes like you do and for someone already in crisis mode they do not need to have your political belief system thrown at them 

Sort of like this  

If you can't understand anything outside your religious bubble don't speak. You know nothing of what that person is going through. If you don't know what that person is going through do NOT tell them to do something that you believe. They may not and it will make them feel worse.  

This is much like my religious aunt, upon hearing my professionally diagnosed major depression disorder told me to just read my bible, all would be solved than.

Do you not know the brain has chemicals that can become imbalanced. Praying or reading a book is not going to put those chemicals back into balance. Medication is needed, not religious platitudes. 

KEEP IT TO YOURSELF.