1. "Karma" literally means "action." Things that you do are karma.
2. It's more accurate to say "some Buddhists" when discussing almost any bit of Buddhist theology. Pure Land Buddhists (is this what you mean by "Punarvadha," Haus? I'm unfamiliar with that term) definitely believe in something that lasts after death (to be reborn in the Pure Land) but don't have too much to say about karma, since your actions really don't matter as much, results-wise, as repeating the name of Amida, or the name of the sutra in which Amida makes the promise that those who repeat his name will be reborn in the Pure Land.
As explained here (section 4) :
As compared with one's karma, which originates from delusion and fallacy, Amida's Karma arises from Shunyata and is in accord with True Suchness. When these two streams of karma meet, Amida's Karma naturally overcomes and absorbs the other, just as a bigger whirlpool absorbs smaller ones.
Tibetan Buddhism also has a lot to say about things which happen after death. The Bardo Thodol goes on at length about choices your soul makes after death, which are shaped by (but not entirely subject to) karmic forces.
Of course, the existence of the soul is essentially illusory according to what the Buddha said, so no soul, no survival, no rebirth, no death.
3. Most of what we wind up reading about karma has more to do with overcoming karma. That's the basic gist of Bhagavad Gita (actionless action = basis of karma yoga), as well as most Buddhist doctrine (stepping off the wheel, ceasing the flow of rebirths). I think to really get a handle on karma, you might have to back-engineer the ideas from these, which are in some ways essentially critiques of the idea to begin with. |