You're right, of course, but he can't be taken as seriously as you seem to take him. His viewing audience in the cable world is miniscule. Look at him as a sort of parody or caricature of MSM liberalism. When you view him in that way you can relax, laugh at his buffoonery, and when he becomes tiresome click onto a serious news outlet. In other words, he lacks the stature or worthiness to be taken very seriously.
What kind of salary does Matthews make? It must be a lot since he bought a mansion on Nantucket next to Mama T and her Boy Toy.