It says all the planes are flying around the armed conflict area why did this one (MH17) fly over it
No, this plane flew exactly as other aircraft in the area - it bypassed the area singled out by Eurocontrol as 'dangereous' (and restricted), it was outside the restricted airspace. This plane flew exactly as everybody else in the area per the latest info. Also the "closed" areas in the general area only blocked altitudes to FL320, this plane flew higher. So this plane was 100% 'legal' in terms of its route.