Atheism is not believing in god. Agnostic is not believing in religion. I don't believe in unicorns. That does not mean unicorns exist. The fable of unicorns exists, but not the unicorns themselves.
Now, if there were a group of people trying to force amongst the population the rules and regulations associated with believing in the fable of unicorns, as well as knocking on people's doors and telling them they are wrong and will be murdered by unicorns for not worshipping the unicorns, or blowing themselves up and murdering innocent people in the name of unicorns, and trying to block the facts and evidence from their children and common public knowledge that prove the fable of unicorns false, then I would hope you would at least have some emotion about it and not stand idly by.
And, by the way, there is such a thing as cause and effect. That is, it is possible for someone to research a topic and gain knowledge of that topic and form an opinion based on that knowledge. And upon gaining that knowledge of the facts, it is possible for that person to want other people to spend the same amount of time and energy researching the facts themselves and not just accept what they are told when what they are told is in contradiction of the facts. And consequentially there could undertsandably be some basic human emotions of frustration associated with the willful rejection of the facts simply because those people do not want to believe the facts.