My guess is people politically oriented to the left are pro-Iran no matter where they live, so they tend to oppose an attack. They are simply supporting the Islamic Ayatollah regime, and this has nothing to do with nationality. Right wing oriented people, tend to support democracy and oppose to oppressing regimes, so they are in favor of an attack. The price might be high, but letting an evil dictatorship having this power is a greater danger. This too transcends national borders.
Report in Lebanon: Israel Air Force strikes Syria's Quneitra, 3 terror operatives killed (Haaretz)
from the article: Poll: Opposition to Iran going nuclear widespread throughout world