It can not be reformed, it would require renouncing the words of its founder.
Stark differences in the way the founders of Islam and Christianity lived.
The “Christian” crusaders did not live the way their founder lived: 1) Love God and keep his commandments. 2) Love your neighbor as yourself.
Then when asked “who is my neighbor” Christianity’s founder gave the example of the good Samaritan, your neighbor is anyone closest to you at any given moment. Love them. If people would do that it would change the world.