
Not surprised Shaia is acting this way, he has always shown this side of him from time to time when he was a kid, until Daato showed up to reprehend him. Like, the first time he fought with his twin brother Hugo over a toy, and scratched Daato's arm by accident when Daato was trying to separate them and make them stop fighting.
Or the time when the twins met theo for the first time and they started treating theo as a slave, especially shaia before Daato stepped in to reprehend them about their behavior towards their service.
I'm pretty sure there's being others instances were we can see glimpses of this attitude on shaia when he was a kid. But, nevertheless, i am not jumping to conclusions about this attitude since he may have a reason for doing all of this (after all, I'm pretty sure Daato and Juda influenced their kids into being kind towards people). Since the kid was introduced by Tonari (the previous head of the Siegfried, and whom didn't like Daato as Juda's partner) shaia make think there's something fishy about it?. I'll give him the benefit of the doubt.