1. No doubt the event of karbala is epitome of social justice. It cannot be separated from that. At the same time it highlights on the great merits of the Ahlul bait. Therefore, both social justice and be Ahlul bait are relevant when discussing karbala
2. Use the wasila of the Ahlul bait as much as you can so long as you believe Ahlul bait art not independent of Allah