Were my dogs protecting me or showing aggression?

Ok so I was walking my dogs, and these mexicans in a gold hoopty slowed down their car and rolled down their window to try to get my attention. I told them to eff off but they proceeded to follow me. Then they started yelling things like hey ***** nice ***, and asking what size my were. At this point my carolina dog started to bark and growl and all her fur on her neck was raised up. My pitbull/husky mix then jumped up onto their car window and started barking really loud until they drove off. Were my dogs protecting me or were they acting aggresively because of my fear? I've noticed they only bark at men who get to close to me, especially at night. Should I be worried they'll attack someone one day?