For one Gabbard is more popular than Stein and even Stein seems to have had an impact on the election. Remember, it only takes a small swing in one important state to turn the entire election.
She's definitely fringe but if she can pull 50k votes in the key states it could be massively damaging.
Your criticism is 100% bullshit since there were plenty of Democrats that voted for the Iraq war, so obviously I'm very critical of their decision as well. Furthermore, there were issues where I agreed with Trump (until he back tracked, off course). I really liked that he wanted to do something about the price of drugs, for example. That is, until he met pharma executives and changed his mind.
I am against Trump because he's stupid, careless and corrupt. But you'll keep making shit up as to why I hate the guy, won't you?