I can answer the first two questions! In Emprise du Lion, Beleth and Cade got into an argument and Beleth ended up pushing him. This is generally what people refer to when saying that she provoked him, although its the general consensus that his response was pretty dispreportionate.
He hit her around pretty good and was about to use his sword on her when Alistair (and Nerva!) intervened.
For full details, the thread this takes place in is located here.
Cade was shortly thereafter taken to Cullen, who temporarily took him off active duty and took away his weapons. This thread is located here.
After that, the Templar knight-captains and Seekers held a separate hearing, where it was decided that he would be permanently removed from any combat role. This thread is located here.
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He hit her around pretty good and was about to use his sword on her when Alistair (and Nerva!) intervened.
For full details, the thread this takes place in is located here.
Cade was shortly thereafter taken to Cullen, who temporarily took him off active duty and took away his weapons. This thread is located here.
After that, the Templar knight-captains and Seekers held a separate hearing, where it was decided that he would be permanently removed from any combat role. This thread is located here.