As to the hyopthetical situation question envolving a car wreck I would pray and pay no regard to the muslim. The difference here is i am not chooseing my surroundings. I did not choose the setting but in the other i am chooseing to go and be a part of an interfaith setting. All the pastor would have neede to have done inorder to show the Love of Christ is have a separate prayer vigil on another evening.
2Corinthians 6:14-18
14 Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
15 And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?
16 And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.
17 Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you.
18 And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.