WASHINGTON — An Ohio man charged with storming the U.S. Capitol and stealing a coat rack testified Wednesday that he joined thousands of protesters in ransacking the building last year on what he thought were orders from the president, Donald Trump.Dustin Byron Thompson, 38, of Columbus, Ohio, said he took to websites and the internet after being laid off from his exterminator job in March 2020 and in his pandemic doldrums fell under Trump’s sway as he bought into conspiracy theories and “went down the …