Ok maybe i'll explain my line of thought:
Immune means character is resistant to some kind of effect. FAQ describes two common types of effects: choosing a specyfic character and effect affecting more than one character that does not use targeting. Those are two types of effects in CoC. In both cases immune card is not affected.
There are cards that force other player to choose a character. For me they seem to still be targeting the character and the character is still immune to effect so he cant be targeted. The only difference is who makes the choice.
What you're saying is that because other player was chosen, and then he rather than the one that played the card chooses the character, its suddenly not targeted effect and is not described in the FAQ (even though this player has to choose a character), it is also not an effect that affects a group of characters - i kinda see this point, but at the same time this doesn't make sense to me, but maybe that's how this game works.
(and if it does work this way i think it should be stated in Immune FAQ section, as its far from intuitive; just one statement that immunity protects only from certain types of effects, and there are effects that immunity doesn't protect from with an example of such effect type)
Hmm in the whole card pool there are:
- 5 cards with immune to polar events (4 characters, 1 attachment granting it)
- 3 cards granting triggered effects immunity (2 characters, 1 location were discussing)
I see how this ruling might be key when fighting The Claret Knight, so maybe its intended to have some way of affecting this guy. But if so it would be nice to put it in FAQ. Immunity seems to be the mechanic that was pretty useless in CoC, but MU pack makes it much more important, so maybe my confusion is due to lack of familiarity with this type of protection.