So Allah's name was revealed to Muslims from Prophet Muhammed right?
pagan, idolater Arabs used the name Allah for God long before Prophet Muhammed. there were variations of this also used by christians and jews, who come from the same region. Jews and Arabs are related. Arabs are the descendants of Ishmael (Prophet Abraham's first son) and the Jews are descendants of Isaac (Prophet Abrahams's second son). they didnt share the same mother.
How do you Muhammed was right and was not just imagining a name? Because he showed you some miracle which normal humans cannot possibly do? So based on that you trust Muhammed and say he is right and Allah is the one God.
miracles are a sign of prophethood, but its not enough to be a prophet. Prophet Muhammed was prophecised in the Old and New Testament. there are also many references to him in the Parsi and Hindu scriptures. he had other signs of prophethood that those who met him verified that he was the prophet that was being awaited. the Jews gathered in Medina waiting for a prophet because their scripture (Old Testament) told them the place he will appear. some believed him and became muslim, some didnt believe him because they were expecting the final prophet to be a Jew, and not an Arab. but if the prophecies are read properly then one can see clearly that it talked about the final prophet being an Arab, not a Jews. can refer to Rabbi Mort's lectures for more on this, and he has accepted that this last messenger was indeed Prophet Muhammed.
Similarly, Jesus performed certain miracle and people who witnessed that started believing in his story and call him God (or son of God).
Chrisitans nowadays believe that he claimed divinity (that he was God, and/or the actual son of God). but at one point most Christians didnt believe that. many of them didnt believe he was crucified, let alone raised from the dead on the 3rd day. Jesus was prophecised in the Old Testament, but not mentioned as the final messenger. the final messenger was Prophet Muhammed.
Some miracles were performed by Krishna, Rama etc and the story goes similarly.
i dont know about krishna and all the other hindu gods/avtars. i believe the earliest/purest form of hinduism was islam, and the hindu scripture (the most important ones) say to believe in only one God, no idol worship, etc. that sounds like Islam. then you factor in predictions in hindu scriptures of a messenger to come with such precise information that it can only be one man, Prophet Muhammed. that is why i believe hinduism at one point started off as islam, just like judaism, christianity, zoroastrianism. but just like all those other religions they drifted away from the core message and became diluted. all those religions central message is to believe in only one God, worship only one God, and no idol worship.
Its the same theme repeated across time and geography. How can we be absolutely sure that these events are not connected to each other? That it is not the same supreme being sending down messengers at different time and place.
of course they are connected. the kings of finding the connections were the Jews, until the Muslims came. but Jews are still very important. Muslim scholars mostly debate them (when it comes down to the Abrahamic religions) because the Chrisitan scholars dont know much. for muslims learning the connections between Islam and other non-Abrahamic religions was harder because of language barriers that those non-Islamic scriptures are written in, especially hinduism because its in a very old, pretty dead language. but some scholars like Dr Zakir Naik have been pioneers in the field of Muslims studying hinduism to find the connections between Islam and Hinduism.
It is similar. How do you trust Abraham and believe he got a convenant from God? He must have showed the humans some miracle then.
Abraham got a covenant, he was a prophet. Muslims, Christians and Jews all believe this.
How do you know that Quran was only real miracle and other miracles are false.
no muslim says other miracles are false. Quran is a miraculous book unlike any other scripture because it was perfectly preserved since the time it was revealed by Allah.
We humans are needlessly fighting over religion and debating whose is better.
only a non-muslim thinks this way. those who know enough about Islam think very differently on this matter. God comes before all else.