So islam graduated from mere crime to war-crime, such that an extra-large police force called an 'army' is required to stop it.  So what?

That change of scale doesn't change the fact that it's still a large crime-gang, and that the same principle for determining right from wrong (Do Not Attack First) is enshrined in the UNs founding charter which details the #1 war-crime as "to be the aggressor in war.