This paper addresses issues related to the radicalization of women from Europe, the USA, Canada, and Australia, who made a decision to join a terrorist group Islamic State and emigrated on its territory. The focus stands on European women, and with various case studies, there is an explanation of reasons for them to make a decision to emigrate. The aim of this paper is to reach the state of mind and reasons to support Islamic State from jihadists themselves. Throughout history and main participants in creating and originating The Islamic State, we get an insight into ideologies such as Salafism, puristic Islam, and the context in which the Middle East became a prolific place for an organization such as the Islamic State. An ideal seen previously in Al- Qa’ida gave the Islamic State a back up not only by a military or media force but for a radical one as well. Propaganda attracted hundreds of women from the West and from a completely different society than the one that Islamic State stands on. With on-line radicalization techniques, meeting fighters through social media, and creating sisterhood bonds in local mosques, Islamic State attracted numerous women. Jihadists and their roles in the organization different than the ones of women. Because of all the suppressed ways sharia law implemented in the Islamic State treats women, the hypothesis stands that there were problems with the society that made women join. Using jihadi brides testimonies from the literature, media, and social media, I segregated their reasons and motivations into the six most common ones.