Perhaps, as Hindus, they do not believe in, and therefore do not require, salvation?
Has God created millions of people over history, that He knows will go to hell?
Then as Hindus, they may be happy and pleased with their demise. What a wretched thing. Perhaps they believe they have no soul? Soul-less things ‘just die’. We, on the other hand, have souls and when this body dies, they will have a destination. Heaven or hell.
God desires that not one goes to hell. Not one. The rub is that we are created with free will. WE are the key, will we humble ourselves to God, accept His son as our Saviour?
What an amazing gift that is. The wages of sin is death, eternally. We are all guilty of it. But that guilt was paid for when Jesus laid down his life on the cross. My guilt-fee is paid in full. Just by acknowledging and accepting Jesus.
The millions that will go, go having refused Jesus. I pray that is not you.