“I am a muslim and I invite you to Islam”.
Most Americans who call themselves Christians don’t know what Christians really believe or what muslims really believe, so proselytizing for the muslim is easy.
We should start by teaching what that sign really says: “I am a muslim and I invite you to SUBMIT”.
They’ll have to take my head.
The reply should be,
“I am a Christian and I greet you in the Name of my Lord and Savior Jesus Christ!”