I find that most cagers are OK. In fact, I've never had a single issue with a cager in Germany or the UK so far. In fact, I have many more issues with other cyclists, especially those riding on the wrong side of the street (salmon), those with no lights (ninjas), those riding so far they don't watch traffic (racers) and those with blinding lights without cutoffs (idiots).
On those I see the cager as more of a friend than an enemy.