Is Buddhism a form of nihilism?

Several days ago, I posted a quote from Osho on Facebook. Osho said:

Buddha said again and again, “That is the beauty of the word (Nirvana). All those words which create desire in you are not going to help you because desire itself is the root cause of your misery. Longing for something is your tension. Nirvana makes you absolutely free from tension: there is nothing to desire. On the contrary, you have to prepare yourself to accept a dissolution. In dissolution you can’t claim the ego, hence the word remains unpolluted.” (Osho, Beyond Psychology)

Shortly afterward, I got a reply from a Mulsim friend. He called it “religious nihilism.” I found this response gruff and seemingly hostile. I asked him to elaborate. He responded with the following:

For one thing, is it not clear to you how purely materialistic the designation of the self or soul is to such a Buddhist viewpoint of Osho? (The notion that) death is an underlined declaration of the complete ceasing of existence, therefore any meaning for that existent experience is nihilism. The scary part of such ‘spiritual’ philosophy about the existence of the cognizant being (actually it’s pure materialism for them) is that it seems life and all its adventure is now simply a waiting game for it to end, as if now the ‘goal’ has been achieved. My spiritual being is shaking and rattling in…