One can read most any day a remark by a conservative Christian about the heresy of a liberal/progressive Christian. There is often an equally blistering rebuttal. This has been going on forever. The link was written by a progressive who wishes conservatives would at least acknowledge that progressives are a legitimate branch of the faith. He admits not everyone or every branch of Conservatives is intolerant but it is common.
One fork in the road these days is abortion. If you are a conservative Christian who believes a fertilized cell is a human being like those already born, you likely will find any Christian who does not agree to be in the enemy camp. Repeated often is the view that if one believes in abortion rights he/she is not a Christian.
A healthy intellectual improvement would be for all Christians to agree there is no absolutely correct version of the faith. People born into different cultures see the faith in a different light.
I was reminded of that today when I received a copy of a private blog by my friend, Pastor Howard Bess. He wrote that as a Baptist he had never heard the Apostle’s Creed until a young adult. It seemed strange. He became an American Baptist preacher and even today does not recite the creed when visiting other denominations. The Bible, not a compromise essay written at a convention centuries after the time of Jesus, is the Baptist authority.
More tolerance within the faith is probably not possible.