You did not read carefully enough. Muslims were subjected to the same treatment Jews and Muslims have faced from Christians and Jews respectively. Muslims were being driven out and hunted. The Jews had reneged on agreements and promises and allied with the enemy and for that Muslims considered them enemies and waged war against them. None of this is exactly out of the ordinary by the 6th and 7th century standards. I m sure you are crying yourself hoarse over them because of your modern day sensitivities but history books will show you that is how matters were conducted back then.
Actually, they still are in this day and age. USA dragged all its allies into its war "of" terror and they even told Pakistani leadership, either you are with us or against us, there by leaving no choice.
Pretty much all the instances you have quoted were Muslims acting upon a survival instinct, taking charge of their own territory from where they had been driven out to Medina because of their faith. If they had been accorded the same rights and protections that Muslims offer minorities, and not been hunted, etc, they would not have gone on such an offensive.
You can read up more on the history OF THAT TIME. I think the Muslim state became conquering and expanding much after that time.