Beliefs that we held as JWs - apocalyptic beliefs and beliefs about non-JWs - are like a parasite that corrupts the mind. We should find it easy to understand Muslims.
Some have recovered from the effects of the religion and some were immune. Others have an outward appearance of being healthy.
People should be judged as individuals but sometimes the group they choose to belong to should rightly give us pause.
The key difference is that infected JWs are waiting for god to bring Utopia. Muslims are commissioned to make it happen now by force. Therefore ISIS's ambition for a global Caliphate.
Many of our Muslim neighbours are entirely safe. Mass immigration of young men from countries where fundamentalism is endemic can't end well.