Not to get too political\opinionated but Israel does not have a particularly strong reputation for respecting international laws regarding Palestine (West Bank or Gaza) which makes it even more surprising if they continued to supply power.
Sure thing. Your assumption that "it was smashed in the first place" is based on a news report, my assumption being that you are not a Gaza power station employee. In a case where something was fixed nearly a year ahead of the reported schedule, in one of the slowest moving industrial zones on Earth, which is more likely: A) A miraculous feat of engineering happened or B) The damage was not as widespread or destructive as initially reported, if even present at all.
My "logic" was not a value statement on whether the attack was justified - rather a suggestion that before you go posting certain events as fact, you should realize that not everything published is a definite fact.
Actually, I'm curious, how does Gaza get its internet? Any source/reference mentioning this?