There is a trope that we ex-Hindus come across very frequently when we tell people that we are atheists – “Atheism is accepted in Hinduism”. The implication is that us atheists should just shut up about tolerant Hinduism already and concentrate on the intolerant Abrahamic religions. However trope is only partially true. Atheism is accepted but in the sense that you aren’t going to be socially ostracized for professing a non-belief in god. But that is all. Try to go beyond dictionary atheism and practice the values that are derived from your atheism, and you’ll see why.
If you say that you don’t want to accompany your family on the trip to that temple, you’ll be asked why you’re being such a spoilsport. You’ll be asked “what’s the big deal”?
You want to marry out of caste, especially from a lower caste? “You are going to bring disgrace upon this family”. Cue the sulking and refusal to talk for weeks, months or even years.