Muslims should be treated with respect, kindness, and gentleness. "with gentleness correcting those who are in opposition, if perhaps God may grant them repentance leading to the knowledge of the truth," II Timothy 2:25, NASB.
If Muslims decide that they would like to persecute Christians, Christians are to respond with kindness.
"Bless those who persecute you; bless and do not curse." Romans 12:14, NASB.
"not returning evil for evil or insult for insult, but giving a blessing instead; for you were called for the very purpose that you might inherit a blessing." I Peter 3:9, NASB.
With that being said, we still have to oppose their doctrine. A Christian should want the Muslim to be saved, and make efforts to teach. "with gentleness opposing those who are in opposition..." II Tim. 2:25.
"If anyone comes to you and does not bring this teaching, do not receive him into your house, and do not give him a greeting;" II John 1:10, NASB. I don't believe this verse is saying I'm not aloud to have a member of a false religion in my house. What I do believe it is saying is that we cannot ever show support of one's decision to teach and practice falsehood.