I didn’t think my dad was actually being sarcastic when he replied that way. His text conveyed a tone he didn’t intend, just like when my neurodivergent ass says something in a tone of voice harsher than I intend.

Both of those are people inferring meaning that isn't there. I would bet money you didn't say stuff in a tone of voice harsher than you meant, they just didn't like what you were saying and read way too much into it.