What's the difference between Islam and Radical Islam?

Exactly. When you say things, I listen to your motivations for what you say - it would be silly of me to listen to your enemy's explanation alone, wouldn't it?

Suggesting we learn from history is not suggesting the past is the same as the present. I'm not suggesting we assume all people who do 'x' are the same throughout all time. Sure, they say things like"This traffic is terrible"
"I hope Manchester United wins the league"and so on. Many religious people believe in bringing their religious morality to the rest of the world. Many atheists believe in bringing their irreligious morality to the rest of the world. Most of them aren't terrorists. So I don't see how this is a useful data point in the discussion. You should check out the Tanakh at some point....

According to the Quran Allah is not part of a pantheon, he is the One God the God of Abraham and Moses and Jesus. So did Mohammed. Not according to the Quran. Not according to the Quran.

There are abundant similarities. Way to miss the point. There are histories of Judaism and Christianity which point to them taking deities and ideas from other religions. When we point them out, you say 'not according to the Bible'. So which is it - are we allowed to use histories, in which case we can criticize your religion in similar ways you criticize Islam - or are we not allowed to use histories, in which case you can't criticize Islam the way that you want? It seems you can't even get the revisionist history right.
a
The moon God was called Sin. Message 5 of Does Allah = Moon God?. As the Quran explicitly says: "Do not prostrate before the sun, nor the moon". Christian Arabs call the Christian God, Allah. No. The crescent moon didn't become connected to Islam in any particular way until around the fall of Constantinople. It was also linked with the Sumerians, the Sasanids and the Christians. It didn't become strongly tied to Islam until the 18th Century when the Ottoman empire started to use it as their flag and it didn't become the symbol for 'Islam' in general until the 20th Century - particularly in 1970s with the rise of Arab nationalism.There is an open thread on this whole topic from antiquity: YHWH, Yahweh, Jehovah, adonai, lord, elohim, god, allah, Allah thread. where this will be more on topic. This thread is about differences between radical Islam and just Islam.

a) that isn't in the Quran
b) God himself almost did the same thing in the Old Testament. Some Christians have believed Jesus was not the son of God. According to the Old Testament, Jesus was Moses' assistant. He even gets a whole book dedicated to him. The name 'Mary' in Greek is Μαρία. In the Old Testament the sister of Moses is Μαριάμ. It's the same name. Some people share names, and some names have multiple variants.Jesus is called Isa in Arabic Ieusu in the Latin, Iēsous in the Greek, if you go from Hebrew to English it is Joshua (when English used the 'soft' 'J' or Yeshua). Moses is called Musa. Abraham is Ibrahim in Arabic, Abraam in Greek, . The languages are different, and when you translate between multiple languages, choices are made and sometimes different sounding names emerge by the time you reach English. Heck, just look at Cristbal Coln I mean Cristoforo Colombo - I mean Christopher Columbus. Same guy each time, would you believe.Edited by Modulous, : No reason given.

There is no such thing as equally authoritative writings. No it doesn't. If they think Jesus is the annointed one, the Messiah, the Christ - they are Christians. This means nothing. There are multiple people called Mariam, or Miriam, or Maria or Mary. The Quran does not confuse these people as you claimed. The Quran does mention Moses' sister, it does not think she is the same as Jesus' mother.Edited by Modulous, : No reason given.

Wrong. Authoritative - yes according to some. But not equally. In any case, an eschatological prophecy about the antichrist is not an instruction to kill all Jews today. This is so, for most Muslims (but not all). Similarly for Christians, of course - they rely on extra biblical sources for help interpreting the Bible.