Some of them actually know better and they are just being difficult. Changing your mind means having to admit you were wrong and that's a really tough thing for some.
Changing your mind is easy David, the idea that simply changing your mind is some sort of sin or mistake—that it’s an undesirable behavior or characteristic that immediately qualifies you as unreliable, careless, and indeterminate.
When it comes to describing people who have the guts to change course, I’d actually use different adjectives altogether. What ones, exactly? Well, words like self-aware, brave, and constantly evolving seem to fit the bill.
I though this was your aim for the New Year to change your mind, we could ask you why you changed your mind about your rifle knowledge and the weapons you fired, I would say most who have joined the forum came we a belief that Bamber was innocent only for a high percentage to leave with a different view, hows that being difficult?