I have learnt not to be judgemental. If someone has lost their belief system and their friends and family then it is likely they will manifest symptoms similar to bereavement. Anger is unsurprising and a hostile reaction to religion is not unexpected. To assume that these are not valid responses to the pain and rejection they are suffering and to suggest that everyone has to be well mannered and respectful is a little unrealistic. As has been said we do not know all that has happened to another individual.
Everyone has the right to reach their own conclusions about God and to make their own choices. I do not find it offensive when people offer alternative points of view. Rather I find the debate stimulating and refreshing. Conformity is not condusive to robust challenges and after all isn't it better to revisit ideas and beliefs and find out how they stand up to scrutiny rather than blindly follow without question.
We are individuals we choose how we behave, sometimes we react instinctively but we share the pain of being tainted by an organisation that cares more for itself than for the people it claims to serve. I have been inspired by many of the examples of ex witnesses here and elsewhere and the only shock I feel is that the organisation is still able to do damage to so mahy lives and there are still people out there who blindly follow it.