How can you harm an innocent human being and claim that you are a Muslim
Please read QUR'AN and SUNNAH for right path.
Quran says in Surah 5 verse 32
Hopefully , these verses of the Quran clarifies you to whom we should fight and whom we cannot. We should pay attention to those people who just quotes thing out of context and some time wrong text and try to say that Islam allow to kill innocent non muslim. Islam does not allow to kill innocent peoples whether muslims or non-muslim , and teaches us to treat them well.