The emperors who control an Immortal Realm are not exactly naive.
Take Jin Ritian for instance, he might come across as a forthright person. Still, he has a lot of hidden intentions.
The sudden yelling of Li Jing wasn't to warn the four about danger but rather to take the kill from them, which the three quickly understood.
But what could they say?
First, they misunderstood.
Secondly, they were too busy running for their lives.
At this moment, Kelan was hiding in his own world, unaware of what was happening outside.
Ignoring what Li Jing did previously...
On both elements, the three couldn't come forward with any remarks.
Returning to the issue at hand...
Li Jing's action kind of confused them.
Anyway, it was killed. Does it matter who did it?
Could Li Jing really be trying to show off by doing so?
But he's not that kind of person!
If he really likes to show off, there wouldn't be a need for him to hide behind a mask.