I believe context is very important when reading scripture. You brought forth Quran 33:57 but you didnt paste verse 58 along with it. Let's read the verses,
33:57 Indeed, those who abuse Allah and His Messenger - Allah has cursed them in this world and the Hereafter and prepared for them a humiliating punishment.
33:58 And those who harm believing men and believing women for [something] other than what they have earned have certainly born upon themselves a slander and manifest sin.
33:59 O Prophet, tell your wives and your daughters and the women of the believers to bring down over themselves [part] of their outer garments. That is more suitable that they will be known and not be abused. And ever is Allah Forgiving and Merciful.
33:60 If the hypocrites and those in whose hearts is disease and those who spread rumors in al-Madinah do not cease, We will surely incite you against them; then they will not remain your neighbors therein except for a little.
33:61 Accursed wherever they are found, [being] seized and massacred completely.
Try reading 33:58, it gives context. The verses do NOT encourage violence.
