Even though some would say it's not morally right, I can understand how some JWs can lose it and raise their hands to an elder.
The very intrusive nature of the Witness religion (no boundaries and everybody knowing everybody's business), in addition to bullying elders who go out of their way being meddling, spiteful etc. can cause this to happen. What you have here are uneducated men tampering with people's lives and they imagine they should not be questioned. To add insult to injury, they feel unaccountable for anything.
When I look back on the few times that elders overstepped their boundaries and either spoke out of turn or behaved in an arrogant and overbearing manner, I can understand this. If I were a man I may have taught them a well-deserved lesson physically.
This is the primary reason I could never again be in this religion. There's no way I would tolerate this.