In Buddhism, for example, the view of what accumulates karma differs depending on lineage. Even "good" karma can cause you to be reborn (in the god realm), so being "nice" is also to be avoided, just as is being "mean." Of course, being "nice" and being "kind" are actually different things -- one is selfish (I'm being nice to get what I want) and the other is selfless. Check out https://en.wikipedia.org/wiki/Sa%E1%B9%83s%C4%81ra_(Buddhism) for more
Folks might benefit from a more nuanced view of various religious views of "be(e) nice," aka the Golden Rule...
http://livingpeaceinternational.org/en/the-project/regola-d-oro-2.html
In Buddhism, for example, the view of what accumulates karma differs depending on lineage. Even "good" karma can cause you to be reborn (in the god realm), so being "nice" is also to be avoided, just as is being "mean." Of course, being "nice" and being "kind" are actually different things -- one is selfish (I'm being nice to get what I want) and the other is selfless. Check out https://en.wikipedia.org/wiki/Sa%E1%B9%83s%C4%81ra_(Buddhism) for more
So complex, right?