It is, but it's also falls into line with what I've been saying for a long time regarding officiating in the NFL and that is some franchises are the Golden franchises when it comes to officiating.
The Raiders have a so called "dirty reputation" and refs will throw flags more so against the Raiders as opposed to the Packers, Patriots, Packers, Steelers Cowboys and a couple of other franchises.
It happened with the Jim Schwartz Lions when we had our so called "dirty" defense led by Suh.
Suh either gets a sack on this play or gets a holding penalty.
Why was this blatant hold, which would've most likely ended the Cowboys drive, and the game, via holding penalty, not called?
A.) The refs for a playoff game were incompetent and missed a blatant call.
B.) Suh is dirty and this noncall is par for the course because your team has a reputation and we'll let that holding call slide, literally.
Refs, like any other human beings are prone to bias or influence, and that bias is that franchises like the Raiders are "dirty" and the Suh led Lions are "dirty" and thus we'll flag any slight contact we see and turn away at blatant penalties.
As opposed to how the NFL officials should call games. And that's by a play to play basis.