It is said that there are similarities between Islam and Christianity and also Christianity and Hinduism. Is there any similarity between Hinduism and Buddhism?
Yes, definitely. Gautama Buddha was born as a Hindu, and then he became a Sanyasi. There is no difference between what Gautama Buddha said and what is there in the Upanishads. It is almost the same.
In Hinduism, we went into a lot of rituals and customs; he said there is no need for all these.
Killing animals for sacrifice should not be done. No need for yagyas. Thus he took people from that state to the state of meditation. Buddha spoke about meditation.
In Buddhism, it is said that let everyone be happy, let all the Gods take care of us. It is the same that is said in the Upanishads.