reminds me of the joke "Hey dad why is my sister called Teresa ?" "Because your mum loves easter and it's an anagram of easter !" "Thanks dad !" "No problem Alan"
Anyone that kills for a god is killing for a fictitious god, since all gods are fictional. But to answer your question, because they are bat **** mental and need putting down.
I dont call tea dinner. Dinner is a meal where as tea is a hot drink made with tea leaves. I guess you could have a cup of tea for dinner, if you aint hungry.
I believe Iceland is called that because when the viking found it they found a lot of ice there which they then settled on (east/north east full of ice) Greenland is called that because one of the icelandic vikings got exiled, he found greenland and tricked a load of them to go over by calling it green