I think it was extremely stupid of Rex to have uttered those anti-Qazi statements in FG. All those weeks of experience there would have certainly taught him one thing that the junta is heavily pro-Qazi. This means that only the other half of the FJ is up for grabs. Now, if he had used just a little bit of brains, he would have figured out that in order to be part of the FJ, u should harness the pro-Qazi votes and certainly, that isnt done by expressing bad intentions towards Qazi.
I am an ardent Qazi supporter but dint dislike Rex atleast till i found out bout his true colors. Though i havent seen the episode in question, coz its a week's delay, from what ive read in IF bout this all, i think it was extremely unfortunate that Rex had to be made a villian in this manner due to what he said (or probably did?).