I speak as one who opposes the occupation; having said that, this is, afterall, al Jazeera, which has its own built-in nationalist biases. And, the tear gas cannister appeared from off camera leaving open the question: who threw it? I can't tell from this clip if it was a soldier or if it was an activist from the ISM who may have picked up an already tossed tear gas canniseter and then threw it at her broadcasting live for the sake of creating a dramatic moment. It is possible.
Red Cross delivers aid to Taiz, Yemen, for first time since August (Reuters)
from the article: IDF filmed aiming tear gas at Al-Jazeera reporter in West Bank