Here's the thing: Unless you go looking, Sinclair may not show up anywhere on your local Sinclair-owned station. Many of them are affiliate stations of the national broadcast networks -- WPRI in Rhode Island, for instance, is an NBC affiliate while KDSM in Iowa is a Fox network (not Fox News) affiliate. In fact, Sinclair owns 33 ABC affiliate stations, 27 CBS affiliates, 2 NBC and 47 Fox affiliate stations. Further, in many cases, they own multiple stations -- often "fronted" by competing networks -- in the same market. And, since most affiliate channels are just that -- voluntary affiliates, not owned and operated by the national networks, their local editorial slant -- as in the case of the Sinclair-owned affiliate stations -- may not match the views of the owners of the national networks with which they are affiliated, although many people (like yourself, apparently) assume that they DO march in lockstep with the national branding on their identification slugs.
Now, I would have less concern if companies owning multiple stations were required to declare that ownership with every station identification slug -- in fact, IIRC, when I was growing up in the '60s, this was the case. The local NBC affiliate's slide included the call letters and channel number, the NBC logo and, in one corner, "A Westinghouse Broadcasting Company",or some such, identifying the company that owned the chain of stations of which it was a part.
(...This was also a time when station editorials ended -- by law! -- with some phrase like "This has been an editorial from [CallLetters]'s General Manager [Name]. Station [CallLetters] recognizes its responsibility to present opposing points of view from responsible spokesmen," and then would DO SO when called on it... Don't even get me started!)
The point of all of this is that, currently, one company can own APPARENTLY competing stations in one market, not identify their actual ownership of those stations to the viewers, present matching viewpoints that appear to come from opposing sources, not identify the ACTUAL source..., AND are no longer required to present genuinely opposing points of view.
...and according to some people, this is all a Good Thing (TM) because "Unfettered capitalism is Good and regulation is Bad, m'kay...?"
Does that clear everything up?