Some points of view fail the pragmatic test. They simply cannot work in real-life application. There is no logical problem, just a practical one. You can hold the view, but when you promote it you lapse into contradiction.
The challenge, “You shouldn’t force your morality on me” self-destructs because it’s actually an example of that person “forcing” his morality on you (notice the phrase “you shouldn’t”). It’s like saying, “You shouldn’t be telling people what they shouldn’t be doing.” This is self-refuting in practice.
The claim, “It’s wrong to try to change other people’s religious beliefs,” is usually an example of Practical Suicide. When used as an objection against the Christian’s missionary impulse, it’s an attempt to change the Christian’s own religious beliefs.