The reason it's unimportant is that these same activist employees never bothered to protest other heads of state/terrible people in other countries doing worse things. It was very specifically about US politics and guys they personally disliked, not the application of a fair policy.
Yes shockingly people are more concerned about what's going on in the place they live in than another country on the other side of the world. How many people who work at Twitter could even name the former PM of Malaysia that you mention?
It's not shocking at all, my only point is that twitter has a very specific political bent and their actions obviously reflect this. Why is this controversial at all?