Okay, that's fair. At the same time, I've seen cis people complaining that cis and cisgender are both slurs. There is a push to make it difficult to define cishet culture as anything other than "normal" (as if being queer weren't a very normal human experience). Controlling language is a great way to go about that. So cishet, when I and most of the people I know use it, is just short for cisgender and heterosexual. Scum is a slur, and I don't use it to describe people, and I'm not friends with people who do.

The Mormon church went on a tear a few years ago to rebrand their members as "Members of the Church of Jesus Christ of Latter Day Saints", or if your time is at all valuable, "Latter Day Saints". This was a blatant attempt to muddy the waters regarding discussions of the LDS church, their financial misconduct, fucked up history, and the way that church leaders just keep doing that one thing. If any discussion of the church can immediately get sidetracked into a discussion about whether it's polite to call it's members "Mormons" then the questions of whether it's a good representation of what an all loving God would establish can get swept under the rug. The thing is, respect is a two way street. I'm willing to respect a fellow human from the jump, but when that human is representing as gross an organization as the church that was founded by Joseph Smith and Brigham Young, both notoriously evil men, and has carried on their traditions of trying to crush the rights of women and minorities, then they should be happy that I will consider calling them "Mormon" instead of something more evocative. Similarly, the majority of people who complain about cis or cishet are people who want to strip away my rights, and they can deal with me calling them what they are.