So the combat maneuver Jab, which inflicts the dazed condition would knock a person out of frenzy?
Nope
A frenzied character will ignore all damage that he
receives until he leaves the frenzy. However, getting Stunned
(Shaken or Staggered only) will cause him to be knocked out
of the frenzy
I highlighted the important bit....
Shaken or Staggered only.... So, the lightest form of Stun is just stockpiled with other damage until he receives a heavier stun or comes out of the frenzy on his own.
Also it does not state it but does thrust also give the dazed condition?
Nope, some moves may require knowing other moves, but not all such will be direct increases in power, some will just be Move A gives you the basic forms and knowledge to properly learn Move B as well...
In this case, the Jab is a short, swift poking which can put the foe off -balance (i.e. dazed 1 round), the Thrust however, it a more of a lunge (in thinking in terms of fencing), but the Thrust is also going to less sudden than the jab, thus not knocking foe off balance (unless the actual damage does that...)