Guinness dates back 256 years and is laden with deep cultural connotations for both the Irish and Irish diaspora here in the United States. Any significant change to it is risky.Even if it means removing an element deemed repugnant by a large segment of the population.We could be talking about isinglass — the clear collagen extracted from fish bladders that is used to draw spent yeast out of beer and clarify the finished product — but Guinness is planning to remove that particular substance from its brewing process in 2016 in favor of another less-fishy filtration method. There wasn’t all...