No.  I doubt 75% of Americans even know that Sirhan Sirhan assassinated RFK because of Kennedy’s stated support of Israel.  If someone with Sirhan’s background had assassinated a high-profile American politician within the last 25 years, it would probably be used as an example of Arab terrorism.

I think part of the reason it isn’t classified as such is because Sirhan had no ties to terror groups and seemed to act as a lone nut.  Plus, while Sirhan was an Arab born in Jordanian-controlled Jerusalem, he was a Christian, not a Muslim.