It's not just against ideologies they don't like. It's extremely common in SJW communities as well, like ResetEra and Something Awful, to say someone 'is arguing in bad faith' because they're someone who: doesn't capitulate to an emotional argument, points out flaws in what they're saying, or uses facts that don't agree with their preconceived ideas.
In more mentally damaged examples, they will say someone is arguing in bad faith if they are of the minority being discussed but has a differing opinion than what they expect, points out a pattern of bad behaviour/argumentation by the person they're talking to, or has the temerity to not be ashamed of being cis, white, straight and/or male.
It's most useful as a concern troll - 'I'm worried some people are arguing in bad faith (so I shouldn't have to engage with them at all, and you should think about banning anyone who disagrees with me).' It has become a catch-all for, yes, 'people I don't like and don't agree with', but also inevitably means 'I don't want to have to defend my position, it should just be accepted as true.'
That someone may be having a discussion without being open to hearing the other side can be considered someone arguing in bad faith has, like all SJW terms, been a concept with actual truth behind it that has been overused to the point of meaninglessness. And of course, the Venn diagram of people who claim their opponents are arguing in bad faith and the people actually doing so is a complete circle. They're nothing if not consistent in their hypocrisy.
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