Only a small percentage of Muslims are terrorists, so we shouldn't see Islam as evil.
If Islam denies that Jesus Christ is our Lord and the One who suffered and died for us and then rose from the dead, then it is evil.
But I would say terrorism is a personal choice by each individual. So, I would say that in case a terrorist claims he or she is acting in the name of Islam, this does not automatically mean the terrorist represents Islam. Likewise, there have been certain people who claimed to be Christians but they helped to invade and take the lands of sovereign Native American nations; their claiming to be Christian does not automatically mean they were representing Jesus while taking land from sovereign native American peoples and even killing their squaws and children in order to conquer other peoples. And I think England claimed to be Christian while conducting a campaign of some amount of world conquest; this does not mean England was being Christian, just because they claimed to be while doing that.
So, I am not going to guarantee what is really Islam, based on what certain people claim.
Only a smaller percentage of Catholics abuse children, but we should see the Catholic Church as evil?
There are people who gang up on little girls and mutilate their sexual parts, and these people claim to be Muslims; but I do not know how many people do this and if mutilating little girls is widely officially accepted by ones saying they are Muslims.
I do not claim to know if the number of supposedly Muslim child abusers of this sort is greater than that of abusers claiming to be Catholic. And, like I said, I do not know if this is a more or less universal practice and officially accepted by most people who claim Islam. But I see it is possible that if Muslims in great numbers practice this, they might outnumber those abusers claiming to be Catholic.
My main concern is how such horribly evil men could be ordained as priests, in the first place, and seminary screeners and ordaining bishops and even large percentages of congregation numbers could not tell the difference, and even supposed a number of those men were great candidates and pastors and preachers.
I understand that Jesus makes us sheep, not only leaders, able to tell the difference between a real pastor and an impostor > John 10:1-31. You can tell if someone is of the Spirit of God's own love, versus a person who can betray children > betraying is an act of hatred and cruelty, and its spirit (Ephesians 2:2) is obviously not like the Holy Spirit ministering through a qualified pastor > 1 Timothy 3:1-10.
So, if we can't tell the difference, we need to first get our own correction which only God can give us > Hebrews 12:4-11.