FWIW at some point it also had quite severe stability issues. I'm sure those were solved but that might have contributed to the fact why there was no effort to fork it but instead people went with ZFS, XFS and eventually ext4
If I choose to use a slightly inferor alternative because the name makes me uncomfortable, that is perfectly legitimate.
If using ReiserFS costs me a number of weirdness tokens (like using it in a workplace, and the relevant decision makers are likely to know about the murder now or in the future), then I may choose not to use it to conserve those tokens for other controversial initiatives that I care about even more.
Neither of those decisions may be "rational", but it's also not moralising. I simply have to take a complicated social/emotional calculus into account, something that most do unconsciously 24/7 without thinking "hmm, today I shall get on my moral high horse and decide that this is moral and the other thing isn't".
If you care about those things very deeply, then perhaps that is exactly the right thing to do. Lots of people don't do things because of ideological or personal beliefs, even if it limits their options.