Again, she is insulting and denegrating the position of the lawmakers and voters of her area/state.
A. She was in the majority. The law failed. The politician she wrote was in the minority. He was the one who was out of step.
B. If a politician thinks that a constituent who disagrees is "insulting" them, they need to find a new job. ASAP.
C. Her letter was polite. He replied with insults. That gets him or his positions nowhere, and hurts his cause.