Mercy expands!

Mercy expands/increases as we come down the parampara.
Krishna demanded full surrender.
Lord Chaitanya was more merciful and only demanded faith. But even he wanted to kill Jagai/Madhai.
Lord Nityananda was more merciful by delivering even Jagai and Madhai.
The goswamis wrote a lot of books for the benefit of future devotees.
Bhaktivinod Thakur wrote even more books and setup the platform for the Krishna Consciousness movement.
Bhaktisiddhanta Thakur wanted preaching to spread all over the world and advised his disciples to do so.
Finally Srila Prabhupada went all over the world spreading the movement of Lord Chaitanya.

Thanks to sarvananda das prabhu!