She was a brave and heroic person and the world is sadder without her. Its heart breaking to hear she didn't escape when two of the girls got a chance because she didn't want to sabotage their chances since she looks obviously different from everyone else.
For all the people who want to kill everyone in ISIS, that will never work. For every person you kill 10 will replace them, because it becomes easier and easier to recruit new people every time a smart bomb drops and takes out collateral damage (civilians) or foreign troops invade the country and immediately rally everyone against the foreigners. Blindly going in and mowing down thousands of people will just create a new, bigger, worse form of ISIS in a few years. We definitely need to do more to support all the people fighting them on the ground right now though, especially the Kurds who are getting attacked now both by ISIS and by our ally Turkey.
ISIS is popular with essentially the sociopaths outside the region and men who want a better life and aren't afraid to hurt/kill other people in the region (women get no choices). Time and time again its been said that the worst of the ISIS militias are those who joined from the West, people who would have raped and murdered in their own countries and sent to jail find it a great place to act out without any inhibitions. Its remarkable they are able to keep any sort of order or institutions running.
Its going to take a lot of time but the Iraqi's, the Kurds, the Syrians, Turks, etc have to be the ones that take back their countries, with military support from other countries in the region and supplies and information from the West. Its not as easy as it sounds since there is a complex web of relationships in these countries and sometimes its easier for some of them to just to let ISIS be, a pretext to intimidate and terrorize their own populations.
edit: there's a foundation her parents set up to help refugee groups and other activities, i donated a few bucks in her honor
http://kaylashands.org/?page_id=4