Once again, the predictions were vague and not made within a given timeframe.
I dont see how the prophet predicted Bedouins competing with tall buildings is vague.
About the time frame,
The prophet Mohammed received these predictions from God, through Gabriel (AS) so, it was god's choice not to mention any timeframe, and the prophet predicted that the Dajjal will come, but he didn't say when he will come, so it was god's choice not to mention a timeframe.
Same as the day of judgement, God, and prophet Mohammed (PBUH) never said anything about the time, because the prophet wanted us to pray and do righteous deeds before the day comes, because if I tell my people ' the end of the world will come in 3000 years' and then in the future (lets say 2016) Some muslims will be like, '2000 more years to go' they wont do righteous deeds, they'll slack off, and be lazy.
The part about him being of good character and the people of Arabia being cruel at the time, that is what Islam claims, but there is not proof outside of Islam.
And there's no proof to prove that they didn't bury their daughters, which was a known thing and practiced by some other nations, and treat slaves bad (not to mention Islam is the first religion to speak against and and ban it) And do other barbaric things, there's no proof to prove they didn't happen, if they didn't happen, why did God mention it in the Quran?
Remember that there are always cruel people living around at any given time,
Sure there are, but burying daughters and being shameful of them, treating women like they are your properties, is more than cruel, this is why God speaks against it in the Quran, and God tells us in the Quran not to do these things, protect and feed our women, and respect them, dont bury our daughters, treat slaves as if they are our brothers/sisters, give them good education and good and clothes, you cant prove that the Arabs did all of this before the Quran came, they started doing this after the Quran came, because obviously their paganized religion doesn't speak about this.
The splitting of the moon is mentioned in the Qur'an, but I have not observed it.
Same as the Black Plague, it did occur but I didn't see it happen, does that mean I have to say it didn't happen? just because I didn't see it?
with no evidence of it having ever been split.
The Quran says it was split, then came back into it's normal being, it is mentioned in the Quran.
There is a hadith by Abu Hurayra which is authentic, and it says he saw the splitting of the moon, you cant say 'theres no evidence' while the Quran talks about it, and there's a hadith which talks about it too, if you want physical proof then, cameras didn't exist at the time of Prophet Mohammed (PUBH) Sadly.
I am quite skeptic when people tell me that this and that happened but cannot offer any proof to back it up.
Strongest proof that it happened, it's mentioned in the Quran, if it wasn't mentioned, then it wasn't split, but if it was mentioned then it was split, if something didn't happen, no one would talk about it, if it did, people would, and God spoke about it in the Quran.
They need to make clear predictions that are in no way vague
I dont see how its vague that he predicted the Bedouins will be competing in tall towers, I dont see how that's vague.
I dont see how its vague when he says 'there will come a time when the worst of you will become leaders' yes, you can say Arab leaders, American leaders, Iranian leaders.
There are so many predictions made by Prophet Mohammed (PBUH) and some of them were true, some of them are still not yet completed.
clear in terms of time, location, and the precise events that will happen)
Where did the Prophet (PBUH) get his predictions from? God, it's god's choice not to mention a location, and time, why? it's his choice, not ours, what matters that it happened.
and they need to perform clear miracles that go beyond simple card tricks or levitation that any ordinary magician can do.
[28:48] But when the truth came to them from Us, they said, "Why was he not given like that which was given to Moses?" Did they not disbelieve in that which was given to Moses before? They said, "[They are but] two works of magic supporting each other, and indeed we are, in both, disbelievers."
[29:50] But they say, "Why are not signs sent down to him from his Lord?" Say, "The signs are only with Allah , and I am only a clear warner."
[11:12] Then would you possibly leave [out] some of what is revealed to you, or is your breast constrained by it because they say, "Why has there not been sent down to him a treasure or come with him an angel?" But you are only a warner. And Allah is Disposer of all things.
[29:51] And is it not sufficient for them that We revealed to you the Book which is recited to them? Indeed in that is a mercy and reminder for a people who believe.
[17:59] And nothing has prevented Us from sending signs except that the former peoples denied them. And We gave Thamud the she-camel as a visible sign, but they wronged her. And We send not the signs except as a warning
If Arab poets couldn't bring 10 verses/chapters like of the Quran, what would ?
The Quran isn't some simple 'card trick' as you say, if you read what it says, what it teaches, maybe then you might understand what it says, but either way, its the people's choice who want to change, not god's choice