Holding the stupid door

Rants from the bag
Hello there,
If you know me personally you will know me for my rants. If you know me only digitally you have not been exposed to one of my rants. I will demonstrate one of them for you now.
Holding the door; when did this become an offense to people?
Today I went for some coffee to start up my morning. A woman was walking behind me that I suspected was in her late 60s. I pulled the door open and stepped aside to let her in. She smiled at me and thanked me. It was simple and it was polite. Emboldened by this I tried to do the same when I left for a woman in her 30s. This time I got a "Huff" sound and a mean look. I was shocked enough that no sneering remark of my own came to mind. With a polite gesture I had labeled myself a sexist? In less than 5 minutes my day's great start went to craptastic.
I am all for women's rights. I enforce it even, dragging rules around demanding equal treatment. Here is a fact, I open doors for everyone, or do that stupid lean where you just push it open an extra foot by falling off balance in the maneuver I label "polite cltuz". I didn't do it because you are a woman, child, cripple, political leader, mime, puppy, or clone of Hitler himself. I just did it to be nice. Don't mistake my kindness for weakness though.
I see that woman again I'm holding the door only till she is in striking distance. There is my equal treatment.
-My Chi is trying to help.