Buddhism differs from the other big religions by not really mentioning God. There’s mention of gods, naturally, there were so many to pick from at the time, but they’re all treated as less important than humans even. In a way one can see already here that buddhism at heart is a mono-theistic religion. With that one exception that it doesn’t really mention God.
But just because you choose not to mention something directly in plain words doesn’t mean you deny it. Buddha spoke of the ultimate, of that which isn’t born and does not die. Clearly this is a man who belives in God, in something we could call “the highest” (be it the highest being or the highest state of being).
I think buddhsim was presented in the West by people who had their own (sometimes good) reasons for not liking Christianity and who very much wanted buddhism to be “the religion for atheists”. I was of that opinion myself for a long time. I’ve changed my mind.
One part of that was when I saw buddhsim as it is practiced in Sri Lanka, a country that prides itself of keeping the old, orthodox tradition “as it is”. Here if anywhere you’d find “buddhism in its purest form”, and as such it wouldn’t have any worship or rituals, right? Wrong! It’s a religion just like any other and for the same reason as all the others, we need it to comfort ourselves because most of us live very tough lives.
Another thing that changed my mind was reading Nagarjuna, seeing how he refused to make any certain statement about anything, leaving me with a vision of the universe that was like thin smoke, something that could dissolve in any second, something that didn’t really exist… and yet, there was something so solid about this universe, becasue it was so real, it was there, right in front of me and like Nagarjuna I couldn’t describe it.
How do you describe God? How do you describe that for which we really don’t have any words? Most religions have chosen to give that a name, some even to make it into a person, and buddhism simply chose not to say anything about it because God is what is there when the rest is gone and everyone is silent.