Why was Beltre ejected in the game tonight?

He says he was talking to Felix Hernandez from the field and that the rookie umpire thought Beltre was yelling at HIM. I like giving umpires the benefit of the doubt but homeplate umpire Dan Bellino has no major league experience and appeared to have made a horrible mistake. Beltre this season has shown that he will tell and umpire when he disagrees with a call but typically keeps his cool. I watched the video of him being ejected and it looked like he was yelling in the direction of the visitor's dugout. But maybe he was still yapping at the ump about the previous strikeout?