It all depends on your motivation doesn't it.
Fermented fungus, shitloads of salt and palm oil
Let's break that down.
Fermented fungus- why do you have a problem with this? Are you equally against kimchi? Do you not like people eating mushrooms either?
Shitloads of salt - maybe, but do you police the sodium intake of meat eaters too? I prefer not to eat lots of salt, but maybe once in a while I'll indulge in a salt laden product. Why does it bother you?
Palm oil - by the vegan society definition is vegan, however many vegans strive to reduce their consumption of palm oil though it also produces between 4 to 10 x the yield of other plant oils. People are upset about palm oil because they empathise with orangutans more readily than other, less anthopomorphised, animals that would have their habitat reduced by needing larger amounts of land than palm oil plantations. Properly sustainable is a much better option than some other plant oils.
If you are an environmentally motivated vegan you probably take special care to eat local, seasonal and organic.
Personally, I do see the environmental argument for locavorism, but I often see this argument being used against veganism as some kind of trump card by people who advocate eating local, seasonal and organic, but don't always act on it.