Crouch's motivation

[justcarol67]

No: HPFGUIDX 91606

greatlit2003:
 
Why did Crouch teach Harry to fight off the Imperius curse? He 
actually helped Harry stand up to Voldemort.
 
Antosha:
It seems to me you could argue this a couple of ways. First of all, he
could simply be 'getting in to character'--the MoM OK'd Moody's use of
Unforgivable Curses, so Crouch! Moody feels he needs to follow through
and actually teach them.

Carol:
Or Crouch is so cold and sadistic that he enjoys torturing the spiders
and Imperioing the students, and is using his Moody persona as an
excuse to use the Unforgiveable curses. He also turns Draco into a
ferret, something I doubt that the real Moody would do, however grim
and stern he may be. He was known for *not* using the Unforgiveable
curses if he could avoid it. he alway tried to bring them in alive. In
fact, we don't even know that he actually used them. He may have
killed Evan Rosier in some other way. (Legal or not, they're still
Unforgiveable--that is to say, Evil.)

Antosha: 
Another way of looking at it is that Crouch may not anticipate that
Harry will actually be able to throw off the curse--how much easier
would everything have been if Harry had simply spent the entire 4th
year under Crouch's direct control? <snip>

Carol:
Oddly--and this may seem to contradict what I just said about his cold
and evil nature--I think that a part of Crouch likes or at least
respects Harry and he wants him to be a worthy opponent for LV, one he
can be proud of turning over to his Master. He also, of course, wants
him to win the first two rounds of the tournament so he'll be sure to
win the third and grab the cup. Maybe he want to make sure that if
Karkaroff or someone else tries to Imperio Harry, Harry will be able
to shake it off. And he probably wants Harry to like and respect him,
so that he'll follow his suggestions without any suspicion of his real
intentions--and he succeeds admirably. So kind and thoughtful of him
to give that book to Neville after emotionally torturing him by
Crucioing the spider. "Moody" is the one person Harry never suspects
of putting his name in the goblet or wanting him dead.
> 
Antosha: 
Finally--and I think this is the one that fits the book and characters
best--Crouch is DEEPLY (if not insanely) resentful of his father's
abuse of the Imperius curse and extremely proud of his own ability to
shake that curse off. Remember--it took him a decade to learn 
how to do it. He's got to have a (possibly irrational) desire to share
what he's learned.

Carol:
Interesting insight. I think you may be right. He also wants to share
his knowledge of the other two Unforgiveables in front of the
students. Obviously he couldn't Crucio or AK a student without getting
himself sent to Azkaban, but he certainly took advantage of the
opportunity to show how expertly he could cast them. (BTW, I'm not
convinced that he really had Dumbledore's okay to cast those curses
even though the nonomniscient Dumbledore thought he was the real Moody
and trusted him not to abuse his power. I don't think the real Moody
would have cast them or requested to cast them and I think Dumbledore
would have been very suspicious of Crouch!Moody if he had done so.)
But, yes, obsessed with hatred for his father and resentment of being
under his control. Pride in his own Dark accomplishments and loyal to
his Dark master. A madman and a genius operating on his own logic and
his own agenda.

Carol, who asked before and still wonders what Crouch!Moody did in his
classes the rest of the year