Nope: It only becomes pejorative when the actions of the people it is used to describe are in the majority condemnable - a point that repeatedly flies way over your narrowly focused head.
The term might have appeared occasionally in the past, but around mid-2013 it took on anew and wholly pejorative connotation. Especially when used in its acronym form. Here is the google trend for "Social Justice Warrior". The phrase is almost non-existent until April 2013. Here is the google trend for "SJW". It follows the same pattern, but isn't exactly zero prior to April 2013 due to the existence of a company named "SJW Corp." Now gamergate didn't show up until September 2014, so I can't entirely blame the uptick in "SJW" usage on gamergate. However, you'll notice the big spike in searches for "Social Justice Warrior" starts in August 2014, which is only one month before the big spike in searches for "gamergate".
It's when it's been used since to describe zealots like you who equate any resistance to your methods with being the worst kind of racist/sexist/...ist that it becomes pejorative.
For the record, I don't "equate any resistance to my methods with being the worst kind of racist/sexist". You don't know anything about me other than that I find the set of folks who frequently use the term "SJW" to be somewhat detestable. One needn't be a "SJW" himself for that to be the case.
Your dragging out absurdly un-nerd-like labels to describe nerds shows you up to be a probable faker as well.
The labels are un-nerdlike because the folks in this camp are acting like racist, sexist little shits. Which, presumably, is un-nerdlike.
I understand why people are tired of SJW behavior. Most of the people who are tired of that behavior don't actually use the term "SJW". They haven't even heard of it. The majority of the camp that does use that term actually over-uses it to apply to anyone who points out sexism or racism in any capacity, even when the situation is undeniably egregious.
Side point: the fact that you have such a close sense of group identity with "geekdom" is beyond sad. I don't, and I probably have as much geek "cred" as anyone.
Saul, who became Paul, also was spooked into religion by a meteorite
How do you figure?
The system was down for backups from 5am to 10am last Saturday.