Are we to say that any individual who’s on steroids that has an angry moment is due to steroids? What about the individual who gets angry and kills someone who’s not on steroids? What do we blame it on now?
Meaning of the quote
This quote is suggesting that we shouldn't automatically blame people's angry or violent behavior on steroids. Even people who don't use steroids can sometimes get so angry that they do something terrible, like hurt someone. The quote is asking what we would blame in those cases if we can't just say it's because of steroids.

About Jose Canseco
Jose Canseco was a Cuban-American baseball player who played 17 seasons in MLB. He was a power-hitting outfielder and designated hitter, winning Rookie of the Year, MVP, and multiple All-Star selections. Canseco was a two-time World Series champion and made history as the first player to hit 40 home runs and steal 40 bases in a single season.
More quotes from Jose Canseco
Are we to say that any individual who’s on steroids that has an angry moment is due to steroids? What about the individual who gets angry and kills someone who’s not on steroids? What do we blame it on now?
Cuban-American baseball player
Did I put them in contact with the people to acquire them? Yes. Did I educate them on how to use them properly, and what way, shape, or form, and when, and with what supplements? Yes. Absolutely.
Cuban-American baseball player