He does, and being rid of us does not involve killing us. For now.

[Which is not much, but Moran will take it.]

His motivations are his own, and out stop here, beacon or not, was clearly motivated by his attempt to use us to exact some sort of revenge on people he feels have wronged him and his homeland. But it might have been more useful to say that upfront rather than let us discover ourselves unwitting pawns.

I have less trouble believing the beacons are ancient magic that doesn't always function well and that he couldn't have known how they would react.