Mt 5 You have heard that it was said, �You shall love your neighbor and hate your enemy.� But I say to you, Love your enemies and pray for those who persecute you, so that you may be sons of your Father who is in heaven. For he makes his sun rise on the evil and on the good, and sends rain on the just and on the unjust. ...

Nope doesn't seem to me to be room for slaying infidels there. Which, it seems to me, is the sin which is most glaring about Islam... Slaying others for their religious beliefs.

I don't think anyone with any degree of intellectual honesty can claim we haven't fallen miserably short of our Lord's ideal.

As for OT examples of Israel's practice... I'll assume someone has received God's express command in two regrards for that analogy to apply:

1) We (the USA) are His holy nation by oath & covenant

2) He has audibly spoken a command to our leader(s) to kill everyone who is Islamic

Those two would have to be demonstrably true for the comparison w/ OT Israel to fit.