Totally agree that we need to support Brendan, we do not even have a choice whether we like it or not. Not supporting him, especially by fans in the stadium is going to make it more difficult for him. We want him to acheive success the easiest way possible.
That said, it does not mean that we should blindly agree with his choices and have faith like in god. This is a debate forum and if we agree or disagree with anything we have to voice it out. We are not supposed to have same views alltogether.
Also I don't agree with the idea that if things are not or doesn't work out it would be because of FSG and not BR. He is the manager and he calls the shots. If he is impeded by whoever, he has to sort it out, he is not a kid. If he needs support to sort it out and he is right, he will definitely get it from fans, he needs to have the character for that, else the LFC job will be too big for him.
If he feels he cannot do his job properly and has been lied when intrerviewed, he has a lots of options, believe me. If things doesn't work out while him being in charge, he will be the only one to blame (if he says nothing, it would mean he agrees to it).