Why is there evil in the world, if God is all-powerful and good?

[o_O.Q]

if there is a god and everything we know spawned from it... then of course evil is also its creation

the strange thing is that to me this is self-evident to the concept of a god and yet religious people avoid this point like the plague

but the thing is... what is evil?

evil is merely that which is considered negative from the perspective of a particular group of humans and as issues like abortion show its in constant flux

if i kill 200 people tomorrow, sure to other people i'd be a pretty evil person

but, outside of human society will it matter? will it matter to fish, to dogs, to birds etc? no because its merely an abstract human concept

suppose the people were "terrorists"? suppose they were nazis? then it would be justified but from the pov of the "terrorist" its evil

the type of god i believe in is not a personal god that amusingly has all the trappings of human morality yet is omnipotent... which imo is the silliest thing ever

i'd think that a god would be beyond concepts like these because even in my own experiences i'm beginning to understand that words like "evil" and "good" really have little meaning because theycan be rationalised one way or another constantly