and to all croations; jebem ti isa
Fail.
Correct would be: Jebem ti Isusa.
However, people in this part of the world often swear God, Jesus, profits, Virgin Mary, mothers, fathers and everything else very often, so I don't think that would hurt anybody.
It's not like if someone would write: Jebem ti Atatürka! (Atatürk becer?)