[Ola]

Anger is a poison. 
LHL may not even know his letter, but the writer is full of hatred. Hate is very toxic, While anger can make it difficult to think, hate shuts down reason.

PAP Ministers can just use law to shut people up to cause more anger. 

Or they simply accuse people to create confusion.

Anyway, even without anger, PAP also cannot think straight and cannot focus.