The fat guy in the bar was threatening Rick and then the guy behind the bar reached for his gun so Rick had no choice but to kill them. I think they basically figured that if they killed Rick it would be easier for them to force the others to show them where the farm is.
And yeah, I agree Shane has done some good things but as the story moves farther along he just seems to be getting more and more unhinged.
I know its being presented in the show, through Hershel, that killing the barn zombies was the right thing to do - but to me that still wasn't Shane's call to make. He needed to show more respect for his hosts and if he didn't like what they were doing he needed to move along. Thats my take anyway.
TV shows always break for the holidays.
I saw an ad for Hell on Wheels Season 2 today, but didn't catch when its starting.
