Practically speaking, it's much more likely that the parallel text had too many misalignments; the explanation you provide is probably at best a minor effect,

Practically speaking, it's much more likely that the parallel text had too many misalignments; the explanation you provide is probably at best a minor effect, there are way too many other factors at play to believe that's necessarily the one. Trying to moralize based on a result like this is dangerous. A cool way to maybe provide some evidence that might support your point would be to train a word embedding that compressed the names of entities into a single token, and then demonstrate that SA and ISIS were close in some meaningful sense.