My DH is insecure in a few aspects of his life. I'm no psychologist but his overly-critical, overly-invested narcissistic father almost certainly has something to do with this. FIL is currently staying with us so I've been seeing first hand how this dynamic has played out over DH's life. FIL is a nasty bully, basically, but with convincing 'genial old buffer' mask.
DH has recently been accepted into a fairly prestigious scholarship-only professional development course. It was really hard for him to even apply and I know he was really proud to have gotten in.
Today, after the second day of the course, he has come home a wreck. They had to do public speaking, which is not his forte, and he generally just feels much less articulate and able than the other participants. FIL harped on and on for DH to 'talk about what's bothering him' until, over dinner, DH cracked and poured his heart out about the course and how he feels he doesn't belong there, he's wasting resources that someone else could use, he'll never be as good as the others, etc.
Horrible FIL has pounced on this sign of weakness and suggested that DH is right, that he's always been a bit hopeless, that he's not smart enough for his profession, and numerous other really hurtful phrases. I told FIL (quite forcefully) that he was talking rubbish, to which he replied, "I think I know my son, thank you." I broke up the meal early and have been seething ever since, while DH is practically a puddle on the floor.
My poor DH grew up hero-worshipping this nasty prick and his word still carries a lot of weight. How can I help DH deal with his insecurity (apart from lots of positivity, which I always provide) and convince him that his father is just an emotionally abusive sociopath!?! 