I'm sorry you ran into such a rude woman, but don't let her words hurt your feelings.
I've heard of some hand quilters that look down their noses at machine quilters, but I think they are few and far between. There are also a few that critisize longarm quilters as not being real quilters. Everyone has their opinion I guess.
Fortunately, you are a member of this group where we celebrate all quilts and the members that make them.
I really admire quilters that quilt by hand because I appreciate the time and practice necessary to perfect their stitching, and the patience to work on a quilt for months or years.
Some of us are unable (medical reasons) to do a lot of handwork, or just can't devote the time to do hand quilting so we use our machines. The goal is to create a beautiful quilt and whatever means you use...it is still quilting.