"These people don't act like the Yates." I am inferring from this, that you mean "hey, the Yates were Christian nutcases. THESE guys are nice, normal swingers. I can relate to that!"
That's the way it sounded to me.
I do think it is quite strange the ease with which he forgave his wife and ran to her defense after she killed his five children.
I, too, think it bizarre. But that's not the same thing as "criminal."
Travis McGee might tell you that HE thinks it's bizarre that the van Dams choreograph every press conference, and that he has it from personal knowledge that she turns the faucet on and off for the cameras.
Now, to me (assuming that's true), that is not so much "bizarre" behavior as it is SUSPICIOUS. One might make the case that someone who wished to allay all suspicion would behave in that way.
Whereas, Russell Yates' behavior is weird because it is too disarmingly (and naively) unexpected. Why would he behave that way? If he were truly guilty, I would expect him to disavow her and paint her as the sole, evil villain.
Do not forget that the reason the Ramsays have stayed under such a cloud of suspicion is that they did much the same things the van Dams are doing, refusing to answer certain questions, telling people that their apparent kinky sexual lifestyle has no bearing on anything, hiring a P.R. firm, etc.
Russell Yates gets the business because he is loyal to his wife, the murderer of his children, and no one can understand that (including myself as it happens). But since the van Dams seem to be putting up the correct front, seem to be more savvy in their manipulations, they AREN'T suspicious.
To me, it's "bass ackwards."
What is apparently kinky about the Ramsey's lifestyle? Or do you consider entering your child in a beauty pageant 'kinky'? While it's not what I would do with my children -- I don't think it's kinky -- just a little exploitive. Was there something else?