Yes Castile Soap does kill bacteria as well as any germs that may be on your skin.
Castile Soap actually does a much better job at killing bacteria and germs than regular antibacterial soap does.
I use Castile Soap for washing my hands and taking a shower with and it's a very good soap to use.
The Castile Soap also gets my skin much cleaner than any other soap that I've used in the past.
Also the antibacterial soap that you buy and use doesn't actually remove the germs but it does kill the bacteria and germs so the Castile Soap gets you much cleaner than antibacterial soap does.