You must remember that you represent more than just yourself and that your actions will reflect on your whole organisation, or even the country.
You must first try to understand the reasons for why someone is abusing you, as difficult as this may be. Criticism can both be unjustified and very damaging. By understanding the reasons for criticism, you can much more easily try to change this opinion and eliminate the criticism or distrust.
See 3 of Diamonds
Asa Kasher, ‘Public Trust in a Military Force’, Journal of Military Ethics, 2 (2003), p22.