I heard a Muslim talk to a Christian gathering in which he spoke about the common values between Christianity and Islam, some people said he was a perennialist, I thought he was just doing dawa without first hitting them with you are going to hell. Saying to them you will go to hell unless you embrace Islam first, the first time you speak to someone might not work. Wisdom, subtlety and forethought are not to be condemned. Too much rigid thinking black and white going on amongst some people. I think they are arrogant and harsh.