There's really a lot of het ships. I don't know how many get actively shipped, but I've seen idle speculation tossed around for just about anything.
As for the second question, there's a few reasons, I think. Kallen sees Britanians as the enemy inherently, as the people who are subjugating her people. To find out that the leader she was completely devoted to was the enemy... she has no real way, after all, of knowing that he's for real about all this.
From her perspective, she probably can't even fathom why what appears to be a normal, average Britannian kid would be a Black Knight. Sure, she appears the same way to someone else as well, but people rarely think so rationally with that sort of thing - after all, she knows her own reasons. But since she has no idea about Lelouch's backstory, to her, he's just some lazy kid. Likely she's not sure if it was just a game, or if he's a spy, or what. And she dislikes Lelouch personally on top of it - from what I know, she sees him as a decadent, spoiled Britannian. It's even worse than if he was just some Britannian stranger, really.
The Japanese who support Zero see Zero as their champion - learning that the guy they thought was their hero is actually from the country of their enemy is a huge morale blow, the way I see it. I mean, if your saviour isn't even one of your own people... that's pretty demoralizing to a people who are trying very hard to cling to their identity.
(no subject)
As for the second question, there's a few reasons, I think. Kallen sees Britanians as the enemy inherently, as the people who are subjugating her people. To find out that the leader she was completely devoted to was the enemy... she has no real way, after all, of knowing that he's for real about all this.
From her perspective, she probably can't even fathom why what appears to be a normal, average Britannian kid would be a Black Knight. Sure, she appears the same way to someone else as well, but people rarely think so rationally with that sort of thing - after all, she knows her own reasons. But since she has no idea about Lelouch's backstory, to her, he's just some lazy kid. Likely she's not sure if it was just a game, or if he's a spy, or what. And she dislikes Lelouch personally on top of it - from what I know, she sees him as a decadent, spoiled Britannian. It's even worse than if he was just some Britannian stranger, really.
The Japanese who support Zero see Zero as their champion - learning that the guy they thought was their hero is actually from the country of their enemy is a huge morale blow, the way I see it. I mean, if your saviour isn't even one of your own people... that's pretty demoralizing to a people who are trying very hard to cling to their identity.