no really, politics are part of a pod and a huge draw for a great many players. its not uncommon for people to be cutthroat, its also not uncommon for people to team up to take down a bigger threat - only to backstab the other person. embrace it, exploit it, its part of the nature of the format.
as for the people who tell you you're doing something wrong... well there's always going to be those people in a pod, they're looking to put themselves ahead, its up to you to believe them or not. sometimes its better to blow them out, sometimes it actually isn't, there's no hard rule here other than your own judgement. what i will say is that, well... talk it out. if you're on the fence get a convincing argument out of them. there's been a lot of games where i've seen someone change their play based on someone elses argument and the game dramatically shifts based on that. someone says don't do that because i can do this other thing, and sometimes they're telling the truth, and sometimes they're not. its your call in the end, not theirs.
the best advice, more than anything else, once you've weighed your decisions and made your choice. explain why if you think anyone is testy, and more than anything else don't try do any take backs.