If I may, I'll place blame where it lies - with Death.
The main point of this thread is people trying to make sense of something that is intrinsically unfair to a bereaved person who has to deal with what one hopes are unintended consequences. One of those consequences is changes in the dynamics of relationships at a time when a need for consistency and security is paramount. You need to feel as if you're not being swallowed by quicksand.
I don't think it's a blame game as such to be honest, it's processing, it's constant adjustment and fear is the driver. Fear brings irrationality to the party. The sudden loss of previously supportive people of either sex is another little bereavement, and while in rational terms it may be "wrong", "unhelpful", "unjust" to point fingers or attribute those fears to "imagined" motivations you have to remember that Anger is another guest at this shitty party.
Of course there is no excuse for lashing out or bad behaviour, of which I have been guilty myself, to my cost. However there are multiple, complicated reasons.
For those boiling it down to the battle of the sexes and sexual politics these things aren't a conscious consideration for the most part, they evolve into solid thoughts based on experience.
I'm probably rambling here now but I know what I'm getting at.
And it sounds as though someone's raiding my skip so I'm just going to go and check nothing obstructive is happening on the pavement.
A widow's work is never done.....