What does it mean that my Buddha's compassion has turned into evil?

The original sentence is "snakes and scorpions should report, and I Buddha is merciful and punishes evil!" This sentence is a line from the movie Shaolin Temple, which means that the bad guys think that Buddhism will be lawless if it doesn't kill. As a result, Shaolin disciples are merciful to the Buddha and don't kill anything, but they should also be punished when they meet the wicked. Killing the wicked is just a good idea.