This is really a common strategy. My XAH would drink because...
* I wasn't appreciative of him enough
* the people at work weren't appreciative of him enough
* The weather was bad
* The subway system had broken down
* His mother hates him
* He's stressed, tired, sick, sick and tired, depressed, angry, etc
* We weren't having enough sex
* the baby was making too much noise
* etc etc and so on and so forth
Think about it. It's WAY easier to blame someone else instead of...oh god forbid, BLAMING ONESELF!!!
You can very well tell him whatever you like, but in the end, it won't make a bit of difference or won't cause him to change his behaviour, if that's what you're after. I've become a big fan of "say it once then walk away".