Neither are exactly the greatest, and both have had particularly violent pasts. Considering the median of each religion, it's Christianity by a smidge. Islam's record regarding LGBT rights are up there with Christians (a bit worse, even), and their treatment and views of women are worse than even the callous views of the religious right. When you view the extremes, it's Christianity by a bigger margin. Considering a choice between Westboro Baptist Church and ISIS, I'd take the family of douchebags who deal a great deal of emotional pain, over the terrorist organization that deals physical pain, with emotional pain added from the aftermath. All religions have the right to exist, but the moment that religion infringes on the rights of others, it's not freedom any more. Which is the alarming thing about the stance that the Trump administration is taking.