Hinduism as a civilization.
The Indus Valley Civilization, one of the oldest civilizations in the world takes its name from the Sindhu River/Indus which is nothing but Hinduism. Do you know Pasupati Seal was found in the 1928–29 Archaeological Survey of India excavations of the Indus Valley Civilisation? There are many other pieces of evidence that you can explore.
Hinduism as a collection of religious and non-religious practices.
Another aspect of Hinduism is its collective religious and non-religious practices. For example, Bhakti talks about devotion to attain unity of thoughts with a chosen deity or Sankhya which doesn’t claim that the creator is a single deity, it’s all done by nature and pervading consciousness within it, or ancient Charvakas who said God doesn’t exist at all. Hinduism as a politics. People are busy trying to prove Hindutva to be the game of the present ruling party of India. But do you know even Gandhi followed soft Hindutva? Bal Gangadhar Tilak was one of the faces of Hindutva in the past when he co-existed with Savarkar. The Hindu-Muslim problem existed in the 1880s-90s too as mentioned by Vikram Sampath in his book. Now, this is just during the time of birth of Hitler. This problem of Hindu-Muslim still exists so as the politics. There is no logical comparison of it with the happenings of Europe or the west.
Hinduism as a geographical identity.
Once there used to be a Zoroaster’s religion that flourished on the other side of the Sindhu River. Today we see people from this religion in a comic manner in Indian TV serials and Movies. Do you know in their Zend Avesta book our “S” is pronounced “H”? You can relate yourself to the words Hindu and Sindhu. Basically, everyone born below the Sindhu River up to the boundary of the Indian ocean is Hindu. Every dog, every wolf, every Tiger, every human being, and anything/anyone is a Hindu and it’s a geographical identity and it’s a fact derived from the Zend Avesta book of the Zoroaster’s religion. You are free to accept any single aspect but accepting all will be the biggest accolade to this great living civilization.