Metal is not bad, but I can understand why it can be hard to get into for people.

It's especially hard for me to get into it, since my father forced me to play the guitar (and later the electric guitar) when I was a kid to play those kind of songs. Luckly later I managed to get my own grand piano and learn/play the classical stuff I like!

Yes it is...
It has a beat, rhythm, melodies, notes... What about it makes it NOT music to you?

It is not an opinion to say something is not music, when in fact by definition it is music. To say that a movie is not a movie is wrong, plain and simple. Hiding behind the guise of "but it is just my/their opinion" is simply a way of using the term 'opinion' as a means to avoid admitting that one is wrong.

I apologise if I was rude, however, it is what it is. Having an 'opinion' does not stop you from being wrong. In fact in this case, the word 'opinion' is being misused. You can't look at a bike and say that in your opinion it is a car. 

How? It's just a vocal style like any other. One that existed before it became popular in modern metal.

Care to elaborate on why you don't think it's music (and I'm speaking specifically of Metal, since I don't like screamo or techno)?

Music "That one of the fine arts which is concerned with the combination of sounds with a view to beauty of form and the expression of thought or feeling" - Oxford University Dictionary

Okay, so does Metal, Techno, and Screamo music contain a combination of sounds and forms expression/thought/feeling? Check. 

A quick summary: Heavy metal and its subgenres are another genre of rock music It was developed in the late 1960s and early 1970s. It contains many roots with blues rock and psychedellic rock and is known for loud sound. - Weinstein 2000.

I rather go by the information that I have supplied, at least I have provided sources. 

And going by your definition "the art or science of composing or performing music."

Artists that play these different genres of music 'perform' and they 'compose' their songs in order to craft music.

You sir, are grasping at straws and have invalidated yourself with the definitions that you have provided in order to disprove me... because I was rude? Eh.

It does not matter what your opinion is. Music is music. Fact. I am not trying to assert any authority over what is and is not music. That is what you and Spurgeon are doing. 

Just because you have some sort of bias or you dislike something, does not make that thing 'not music'. 

You also say I am presuming? Presuming what? That music is music? That makes zero sense and does not even deserve a proper response.

Why wouldn't it be music? They're just idiots.

If you take the screaming out of context, it is not music. However, when you have intruments, forming a melody, a song has been composed and someone is using screamed vocales to convey an emotion, it most certainly is music. 

Just like spoken word is music (note spoken word is not rap, rap is music too by the way). If people were to read a script and call it a day, that would not be music. But to read words in such a way, that it reflects the melody of a song, it is certainly music.

You clearly have no knowledge of time signatures, rhythms, or music theory for that matter. You can not decide what is and is not music beause you have a clear bias against it. 

I am not a fan of country music, but I cannot claim that it is not real music, because of the lyrical content, vocal style, and I cannot claim that a banjo is not a real instrument or anything of the sort. That would be completely and utterly wrong. 

I did not want to have to do this, but I actually have knowledge in music, having studied it and being in a band myself, witnessing many forms of music before my very eyes (and through my ears). Some things I did not like, some things were surprising to me. But I was never ignorant enough to claim that it is not music.

Put in short, you can educate someone who wants to be educated. You can reason with someone who is willing to be reasoned with. And then there are people like you, who will not listen, despite their lack of knowledge.

Like I said, if a song has been composed, has an arrangement of different sounds and rhythms, conveys emotions, can be performed etc. It is by definition music. People can either dance, sing a long, or 'mosh' to said music. Different genres of music tend to convey different sounds and emotions. Your lack of musical knowledge is similar to those that would claim that rock is "the devil's music". When such statements are made, it is hard to take the person seriously. 

You don't have to like it, however, it is still music regardless.

For context, I would not argue with a doctor what is and is not an organ. That would be completely foolish. The doctor has studied human biology, while I have (to a lesser degree), the doctor's knowledge in such regards to the human anatomy surpasses my own.

You are just claiming it is not music because you do not think screaming is music. Which means you have ignored the point. In what circumstance, has any of these genres, only contained screaming and nothing else? Let that sink in for a moment.

well metal is defiantly music as it's made using a instrument but the electronic stuff might not be considered music because it's not even made the same way and it's one person with a pc not like a pc is a music instrument