why do some men feel threatened by career women

no i dont think that people are feel threatened by career women. in my opinion every people want carrier woman .

I think that's because men are deep down afraid that they won't be "needed" or "useful" in that woman's life. And that takes away the role of "provider" from them, which is the role that society has demanded of men since times immemorial.

I suppose you could say it’s down to the fact women have something else to offer rather than ‘talent and skills’ in the workplace, if the boss is male, and men being men, they’d know how themselves would react and more than likely would prefer to raise the female rather than the male. Although the reality of this is more than likely very slim!