@PFP: Sorry for initially calling your focal point "him being dumb". It's a weird case. So, work with me here. I reread in context, and through your case. It is a bit convincing, but let's break it down.
First off, how confident are you that Ryker is scum?
Secondly, let's go through your list one by one, and define them by tells! This will help me and everyone else, GREATLY, understand your case.
The Vote on TSN:
I would consider this, if applied to any tell, just voting for no reason; poor reasoning. However, that is if it is outside of Ryker's meta to do so. Agree/Disagree? Also, is it outside of Ryker's meta? I'm not familiar with him.
Unhelpful Questions
Generally I would classify what you titled this as, as Derailment. However, the questions he kept repeating and asking, while derailing, were also just dumb and looked as if he wasn't paying attention. I will give you this tell however. +1
Content Push
I really do not know what to classify this as. I would say deliberately avoiding the queries of others. What do you believe? +1
Soup Defense
I would like to call this a chainsaw defense, however, he flips on him too... That is very odd. Looks like he wanted to defend him, then flipped off of him after he saw it was a losing battle and saw the potential in a Soup wagon. +3
The three tells here are: Chainsaw Defense, Wagoning, and Opportunism Agree/Disagree?
Generalization
I don't believe this is really a strong tell, but however, coupled with the other behaviors, I'll give you this one as well. +1
ZB Reads
I really don't know exactly if that can even fit anywhere other than like, not paring attention or just being plain bad...However, there is a reason that could be there. Sometimes scum ask for excessive explanation from co-mafia. I can lightly see that being the case here.
Vote: Ryker
FoS: TSN
Also, since Ryker's presence has near vanished, and the already quiet, sidelining ZB could've very well gotten onto him. I think it could be that case, but it's a stretch. Thoughts?