Marcel, Israel and Syria are still technically in a state of war. There's no peace treaty between the two states. Violating airspace of one country by another in a time of war isn't called international law violation. Syria's facilitation of weapons delivery to Hizbullah isn't an act of peace either.
UN: At least 1,332 Iraqis killed by violence in July (AP)
from the article: Assad revokes citizenship of politician who visited Knesset