Just respect each others opinion. You cannot force bitcoin to others as well as they cannot force their hatred of bitcoin to you. Just listen, state your point and move on. There is no point in listening more if you already made your mind about bitcoin.
This is a free world and everyone will have their own opinion about everything. If they think that bitcoin is not suited for them, then I don't expect them to have an open mind towards it. I just view as simple as that. I have only been into bitcoin for the last two years and so far I have been benefitting from believing in it. If the day comes that bitcoin lose its value, then I am ready to move on to something that I am going to benefit from.
I agree with you that all of us have a right to have their own opinion to something like bitcoin, we don't need those people who don't like or believe in bitcoin because we are not the losers and they are the loser because they enable this opportunity to just by pass the them and they didn't study and accepted it.