Right. And let's consider your post for a moment. What does stupid mean? Really, you mean that you disagreed. So may I suggest that in your post, it is unnecessary to substitute insult for disagreement.
stupid: having or showing a great lack of intelligence or common sense
you stated the aleague is a joke because an out of season melbourne city squad to lost to a in season top tier J-League team whose average player salary per week is more than double of the melbourne city salaries indicating there is a massive gap talent wise between the two teams
therefore anyone with a little bit of intelligence and/or common sense, would know Sanfrecce Hiroshima would have been expected to win yesterdays match (and the betting odds indicated so), and they won as expected, therefore your sentence is clearly "stupid".

