I consider Shiites more hostile, although they are only 10% of all Muslims.
Shiites are not more hostile - at least than Sunnis. They just aren't hypocritical.
This means they do the very same as Sunnis but admit to do it.
as a mizrahi friend of mine put it,
the shia are more like the fascists, and the sunnis are the guys that tend to get all upset cos you're not like them, lol.