Not really. I think the act of throwing at the batter is a suspendable action. Also, Gregg was tossed from the game (for jawing at Ortiz) before Ortiz was. I agree, that Ortiz shouldn't have charged the mound - but I don't think these facts support your position.
The third pitch was most likely intentional, but you can't suspend someone for that. He wasn't even ejected for it. A suspension for that would have a really hard time standing up to an appeal I think.
And Gregg wasn't thrown out for yelling at Ortiz, he was thrown out for leaving the mound toward the hitter. By rule that's an automatic ejection, but seeing as he only took a couple steps he wouldn't be suspended for that either.
Bottom line is, Ortiz was the first one to do anything that clearly deserves a suspension. When your position is based on things that "maybe sorta kinda" could result in a suspension, you might as well call the facts a dead beat dad, because they aren't supporting anything.