There have been far too many events in the West Bank when instead of taking action, the IDF has chosen to sit back and focus on protecting itself, thus letting the settlers down. You are right to think that the situation is complicated. You would be dead wrong to think that some officers in the IDF have not forsaken their duties and thus let down the settlers.
Diversion of aid ships in Yemen spreads fear of shortages (Reuters)
from the article: IDF soldiers: Problem in West Bank isn't Palestinains, it's Jews