YOU SAID:

there are too many animals killers on this planet

INTO JAPANESE

この地球上には動物を殺す人が多すぎる

BACK INTO ENGLISH

There are too many people on this planet who kill animals.

INTO JAPANESE

この地球上には動物を殺す人が多すぎます。

BACK INTO ENGLISH

There are too many people on this planet who kill animals.