Why did Vader prevent Luke from striking The Emperor?

luke would not hve turned if he struck down the emporer.
thats why vader blocked his attack. why the hell would he have
prevented luke from joining the darkside.

luke attacked sidious, but not out of pure hatred. if that was the case, then obiwan would have been evil for killing maul.

vader needed to wait till luke was...i'll say 'ripe' with the darkside. when luke turned crazed and lost control, THAT was when he was ripe. THAT was when he gave himself (temporarily) to the dark side.

Originally posted by eleveninches
then why did he offer luke the chance to join him and destroy the emperor in ESB

Originally posted by whitewookie
And they would of ruled the universe as father and son. And starwars would have become the worst soap opera imaginable!

vader's gay

well, that 'birth of vader' pic has s&m written all over it...and we know that vader was 'seduced' by the emporer...so.....hmmmm

but he got it on with padme...so perhaps he's a switch hitter? 😂

It's a cover up

as long as the thread's been made, may as well explain:

vader was still evil at that point, and he wanted to hold on to his power.
if he let luke strike down the emporer, luke would have been doing his jedi duty, and not giving in to hate. vader needed him to be evil so that he would become a sith.

i think in the end, vader had hoped that after pissing luke off, he would have been able to keep the situation under control. once luke had turned evil, vader would kill the emporer and take his place. but luke handed vader an asswhooping he wasnt expecting.

thanks for the explaination, for the longest time i've been tryin to figure that one out. it makes sense.