I love these kinds of discussion threads because they exhibit one of the most interesting psychological traits that people show: confirmation bias. Basically, when people have a belief, they tend to accept evidence that supports their belief, but they reject evidence that contradicts it. So, folks who think that eating meat is okay find reasons to think that this study is BS.
Sadly, this is the same reasoning that allows people to believe all sorts of demonstrably untrue things: that Obama is a Muslim, that 9/11 was an inside job, that Iraq had WMDs.
I like to live by Bill Maher's words: "Science is made by scientists, not idiots."