We're just having fun demonstrating a certain aspect of Islam: An orthodox Muslim cannot take the side of a non-Muslim against a fellow Muslim. Even if the fellow Muslim is the criminal aggressor. The dancing around that you and strela have been doing these past few days has been very illustrative for the rest of FR.
This has fundamental ramifications on the question of whether it is possible for Muslims to be loyal Americans. Can a Muslim law-enforcement agent be trusted to investigate another Muslim? Can Muslims be trusted to apply justice on a jury where the defendent is a fellow Muslim? The question of divided loyalty needs to be explored.