Shares of Markel (MKL -0.69%) fell hard after announcing that it would be buying Alterra Capital (NASDAQ: ALTE). Why did the market take this acquisition so badly? In this video, Motley Fool analyst Matt Koppenheffer discusses how this deal is going to cause share dilution for shareholders, and why the market may feel that this "Baby Berkshire"(BRK.A -1.25%) may not have the best track record of growing through acquisitions. He also gives his final thumbs-up or thumbs-down on the deal and tells us why.