Personally I'm completely ambivalent about Robinson and I'm not sure why anyone would be against him outside of him being ultimately responsible for results and performances.
Also bringing up St. Johnstone is a bit silly. Tommy Wright has a 40% win ratio over 300 matches. He has four Top 6 finishes in 6 seasons, won a Scottish Cup and has had some decent European results. And all at a club with the second lowest average attendance in the league.
Robinson hasn't achieved anything like what Tommy Wright has. It's not even close.