You think Christians think its okay to kill these people?
You think Jesus would endorse killing these people who suffer from sin as all others?
I think once again you have the wrong religion.
I think Christians have demonstrated over the centuries that they are more than happy to kill people who refuse to convert or who have opposing beliefs..
I don't think Jesus character depicted in the bible would care about the killing were he real.
Slaying people did not offend him as is clear in the parable told in Luke.
19:27 But those mine enemies, which would not that I should reign over them, bring hither, and slay them before me.
He had no problem raising cities.Luke again.
10:14 And whosoever shall not receive you, nor hear your words, when ye depart out of that house or city, shake off the dust of your feet.
10:15 Verily I say unto you, It shall be more tolerable for the land of Sodom and Gomorrha in the day of judgment, than for that city.
Paul explained how people would be killed with a worse punishment than that typical in the Old testament for ignoring Jesus
Heb 10:28 He that despised Moses' law died without mercy under two or three witnesses:
10:29 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
There are also numerous references to Jesus relishing the 'great barbecue to come.'
I think you are looking at your religion with rose tinted glasses.