YOU SAID:

Now why on earth would anyone do such a thing?

INTO JAPANESE

今、なぜ誰かがこのようなことをしますか？

BACK INTO ENGLISH

Now, why does someone do something like this?

INTO JAPANESE

さて、なぜ誰かがこれのようなことをしますか？

BACK INTO ENGLISH

Well, why does someone do something like this?

INTO JAPANESE

まあ、なぜ誰かがこのようなことをするのだろうか？

BACK INTO ENGLISH

Well, why does someone do this?

INTO JAPANESE

では、なぜ誰かがこれをやっているのですか？

BACK INTO ENGLISH

So why is someone doing this?

INTO JAPANESE

だから誰がこれをやっているの？

BACK INTO ENGLISH

So who is doing this?

INTO JAPANESE

誰がこれをやっているの？

BACK INTO ENGLISH

Who is doing this?

INTO JAPANESE

誰がこれをやっている？

BACK INTO ENGLISH

Who is doing this?