Quran 61:4 – “Surely Allah loves those who fight in His way”
Mohamad Mostafa Nassar
As I have explained many times before, to fight in God’s way, does not involve killing of the innocent. These passages always exhort people to fight tyranny, oppression and persecution. These verses below show the beauty of what ‘Fight in His (God’s) way’ means,
Quran 2:190 Fight in the way of God those who fight you but do not transgress. Indeed. God does not like transgressors.
2:246 “Would you perhaps refrain from fighting if fighting was prescribed for you?” They said, “And why should we not fight in the cause of Allah when we have been driven out from our homes and from our children?” But when fighting was prescribed for them, they turned away, except for a few of them. And Allah is Knowing of the wrongdoers.
Quran 4:75 And what is [the matter] with you that you fight not in the cause of God and [for] the oppressed among men, women, and children who say, “Our Lord, take us out of this city of oppressive people and appoint for us from Yourself a protector and appoint for us from Yourself a helper?”
2 I.e, in unison, with their deeds corresponding to their assertions of faith. This moral necessity is further illustrated – by its opposite – in the subsequent reference to Moses and the recalcitrant among his followers. 
Maulana Mohammad Ali
4a. They had to fight in self-defence; see 2:190, 190a, etc. 
Malik Ghulam Farid
3035. Muslims are expected to present a firm, compact and solid front to the forces of evil, under the command of their Leader whom they should give full and unqualified obedience. But a people who seek to become united into a solid and strong community, must possess one code of life, one ideal, one objective and one goal and one programme to achieve that objective. 
 The Message of The Quran translated and explained by Muhammad Asad page 1169
 The Holy Quran Arabic Text with English Translation, Commentary and comprehensive Introduction [Year 2002 Edition] by Maulana Muhammad Ali page 1087
 The Holy Qur’an Arabic Text With English Translation & Short Commentary by Malik Ghulam Farid page 1131