2. Stroking aside, the real message was pretty explicit, convert or die.
Isn’t it true that according to the Koran, we have been given a choice to convert through this proclamation/message, and they are going to attack us for not heeding?
I don't know. I've seen freepers write that so it may be true.
“they are going to attack us for [not converting to Islam]”
Historically, Muslim conquerors, before attacking a non-muslim city or people, would grandly and publically issue the “call to Islam”, knowing fully that there would be no compliance with this demand. But, having done so, the conqueror was now morally free (by Islamic law, anyway) to slaughter the infidels and leave no survivors.
However, there usually were survivors of Islamic conquests, to be “granted” dhimmi status and be forced to pay the jizyah, or tax to Muslims.
After all, dead infidels pay no taxes.