I think you'd be interested in this
Alagaddupama Sutta
Buddhism isn't about The Buddha as a prophet. It isn't about Dhamma as an sacred text. It's about the Practice of non-attachment to these things.
Hence "kill the Buddha" means let go of the raft.
On that note: From your link
Whatever your conception is of the Buddha, it’s WRONG!
Now kill that image and keep practicing.
This all has to do with the idea that reality is an impermanent illusion. If you believe that you have a correct image of what it means to be Enlightened, then you need to throw out (kill) that image and keep meditating.
--Don't attach yourself to The Buddha (nor The Dhamma)
That is why abrahamic sacred-text believers and Dharmic believers don't mix. The former cannot let go of their raft.
That is another excellent link to beautiful and comprehensible suttas.
The point of non-attachment in Buddhism is well taken thank you. This is an essential teaching of Baha'u'llah that I believe is similar. it is called detachment:
A rich man and a poor man lived in the same town. One day the poor man said to the rich man, "I want to go to the Holy Land." The rich man replied, "Very good, I will go also," and they started from the town and began their pilgrimage. But night fell and the poor man said, "Let us return to our houses to pass the night." The rich man replied, "We have started for the Holy Land and must not now return." The poor man said, "The Holy Land is a long distance to travel on foot. I have a donkey, I will go and fetch it." "What?" replied the rich man, "are you not ashamed? I leave all my possessions to go on this pilgrimage and you wish to return to get your donkey! I have abandoned with joy my whole fortune. Your whole wealth consists of a donkey and you cannot leave it!" You see that fortune is not necessarily an impediment. The rich man who is thus detached is near to reality. There are many rich people who are severed and many poor who are not.
May our spirit be at rest! (Abdu'l-Bahá, Divine Philosophy, p. 135)
Our greatest efforts must be directed towards detachment from the things of the world; we must strive to become more spiritual, more luminous, to follow the counsel of the Divine Teaching, to serve the cause of unity and true equality, to be merciful, to reflect the love of the Highest on all men, so that the light of the Spirit shall be apparent in all our deeds, to the end that all humanity shall be united, the stormy sea thereof calmed, and all rough waves disappear from off the surface of life's ocean henceforth unruffled and peaceful. Then will the New Jerusalem be seen by mankind, who will enter through its gates and receive the Divine Bounty.
(Abdu'l-Bahá, Paris Talks, p. 87)