Earlier quoted context omitted.
Right, but often groups are extremely hostile to apostates because apostasy represents an existential threat towards the religion itself. This is why many religions require a formal shunning of apostates, if not explicit punishment. Talleyrand famously had a meal of ice wine and cold meat after being excommunicated in 1791 since good Christians were supposed to deny him “fire and water”; a cute anecdote at the time,…
Hinduism has no concept of apostasy. You are free to believe in as many gods as you wish (Atheism is a legitimate school in Hinduism), so changing which god your claim to believe in isn't a big deal. The perceived threat is from the claim that all other gods are false, which is one of the major factors in the anti Muslim/anti Christian sentiments playing out currently in India.
However, the attitude of muslims & Christians towards nonbelievers, idol worship and the historical violence and destruction wrought on them plays a bigger role.
A modern western atheist might carry the same "all gods are false", the vast majority of the Hindus will not have any problem with that.