A local protestant minister, Dr Rowland Croucher, has a great little site called “John Mark Ministries” where you will find all sorts of stuff. In his latest email to subscribers, there was this little thought, which I thought was quite good.
Fundamentalism is “believing you have nothing to learn from an ‘other’ while believing the other has a lot to learn from you”. So there are Islamic fundamentalists, Jewish fundamentalists, Evangelical fundamentalists, and Liberal fundamentalists (eg. Jack Spong)etc.
You forgot Catholic fundamentalists, Rowland!