Beer industry leaders have blamed a multi-year slump on everything from the economy and weather to anti-smoking laws in bars. But one top executive is bluntly suggesting that the industry itself is the problem for failing to out-market the spirits category. “The days of beer guys knocking each other around and not worrying too much about spirits and wine is over, and it’s frankly been over for a long time,” MillerCoors CEO Tom Long said in a speech to hundreds of beer distributors gathered this week in Las Vegas for a meeting of the National Beer Wholesalers Association. “We’re going to…