Owen wrote on X: "The current capitulation of reigning champions Manchester City is enough of a story to fill back pages and jam radio stations up and down the country. But there was another story at Villa Park yesterday that genuinely left me feeling sick to the bottom of my stomach.
"There will always be kind, honest, generous, respectful, caring people in all walks of life just as there will always be nasty, jealous, spiteful, bitter people too. But to those Villa fans who booed Jack Grealish yesterday, you fall into the second category and should hang your heads in shame.
"Here is a lad that came through YOUR academy. Supported The Villa all his life and no doubt still does. He single-handedly dragged YOUR team back into the Premier League when you were bang average at best. He kept you up and in hindsight, showed you ten times more loyalty than you are now showing him."