Buddha Vs Jesus
Buddhists believe in karma and reincarnation.
The Bible teaches that there are eternal consequences for our actions, but that we only live once then believers will be judged by God for what they did right and wrong, and unbelievers who rejected Jesus will be judged and then spend eternity in hell.
on Reincarnation and Eternity
The Buddhist belief in karma simply states that what we do in this lifetime can have eternal positive or negative consequences. Their belief in reincarnation basically states that the consequences of our actions in this life could lead to promotion or demotion in the following life cycle. According to Buddhism, following the eightfold path is important because a person’s positive or negative actions in life will determine what they are reborn as in their next life - whether they are promoted or demoted.
A big problem with reincarnation is that there is only limited anecdotal evidence for it and our current scientific research models can't easily prove or debunk these findings. For example, one criticism of reincarnation is the problem of memory, since it would mean that reincarnated people should be able to remember their past lives. On the other hand, Christianity contains a lot of evidence for the afterlife through many very well documented NDE’s (near death experiences). For more on this topic which we do not have nearly enough space to cover here, you can check out the following book: Imagine Heaven by John Burke, and the movie After Life.
While Buddhism teaches reincarnation, on the other hand Christianity teaches that each person is appointed to die only once (Hebrews 9:27), and that what Christians do in this lifetime will have eternal reward in heaven. But if anyone does not believe in what Jesus did for them, then it makes no difference how “good” they try to be, because they will have rejected God’s offer for forgiveness for their shortcomings and even more importantly they will have rejected a relationship with God, therefore they will not be able to spend eternity with Him in heaven, so they will have chosen to live forever without Him and will go to hell instead.