Why did Barty Crouch Jr join Voldemort?

[willsonteam]

No: HPFGUIDX 189756

 
> > June:
> > I don't believe Barty Jr was evil. He didn't get recognition 
> > from his father and really wanted it but his father was too 
> > busy with his work to bother with Jr so Jr joinned the death 
> > eaters to get attention. Bad attention is better than no 
> > attention to some people.

Andy:
> 
> But his actions are not those of a good person, and as someone else
> pointed out, others have had a bad upbringing (like Harry) and even
> Dudley and Draco showed some "good" towards the end.

Potioncat,
The question is a good one--but there seem to be only 2 answers proposed on this list --somewhat represented by the posts I snipped above (the 2 most recent in this thread)
A--Barty Sr. was a bad dad
or 
B-Barty Jr was a bad boy

I haven't read the books recently enough to remember any canon around the Crouch family. And I'm not sure the books tell us what really happened. At best I think it's a blend of those two ideas--it was a little bit of who Barty was and a little bit of his family dynamics. Of course, that's just me, I don't think it should be a choice between nature or nurture but rather a combination of nature and nurture.

We could look at an opposite family for a aimilar question. What made Sirius Black join Dumbledore? Did his parents do something wrong in the way they raised him (I'm sure they were just as disappointed as Barty Sr was) or was it just Sirius's nature to rebel, or to choose a different path? Was he simply rebelling, or did  he truely reject his family's beliefs? 


JKR shows us several families with sons who made choices, and she tells us it's our choices that reveal(determine?) who we are. So maybe Barty was a bad boy.


Of course, to me the really interesting question is "Why did Severus Snape join LV?" If anyone had good reasons to reject the DE way of life, he did.