Your question resonates with me. I, too, am a marketing manager and I, too, have most certainly put relationships at risk by doing what I felt was simply my job. In the early days, bolstered by all sorts of excitement for my new career and a strong desire to do a good job, I wielded my red editor’s pen with reckless abandon.
As I reviewed and edited emails, articles, website copy, and such, I believed a job well done was to return the draft to its owner graffitied by red ink. And believe me when I say I excelled at this work—much to the chagrin of my colleagues.