1) It’s true enough NPR will present the news from a left slant. The author assumes that the GOP typical position is a racist one, and that’s partisan nonsense.
2) You say that as if being critical of trump automatically makes him untrustworthy. Everyone should be critical of every political officeholder. Just because we vote for a candidate doesn’t mean we have to hold his **** when he pees. But perhaps you meant critically unfair or partisan.
Re: #2 - when someone is described as being a "vocal" critic of anyone or anything, to me, that implies something more than just being critical. It implies (to me) very strong feelings one way or another, which has a tendency to make one's views something less than neutral. Just my interpretation.
You and many others have been critical of Trump, and that's certainly fair (and I'd say encouraged), but I wouldn't describe you as a "vocal critic" of Trump. You've given credit where credit is due. I'm less inclined to believe that's the case with Singleton.