Concern troll

A concern troll is a person who participates in a debate posing as an actual or potential ally who simply has some "concerns" before they will ally themselves with a cause. In reality they are a critic. And they use those concerns in an attempt to undermine the conversation. Concern trolling is primarily used to inject the oppositions talking points into the conversation without erasing suspicion.

Concern trolling can result in continual reversion to discussions in attempts to appease the troll's concerns, frustrating attempts at more serious discussion. Concern trolls are not always self-aware; they may also view themselves as potential allies who have just, oddly, never met a conservative opinion they liked.

Another type of concern troll is a liberal who goes onto comment boards and pretends "concern" for the United States, its Constitution and its values (all of which he actually hates) by attacking patriotic conservatives with intentionally misleading comments and false accusations, such as "Why do you hate America?", intended to deceitfully paint the patriotic conservative as "anti-American" when it is really the concern troll, with his support for all things opposed to America and its values (e.g. support for Communist China and neo-Nazi Ukraine, support for abortion, support for [and simultaneous denial of] vote fraud, support for illegal immigration and open borders, support for the LGBTQ agenda, support for Islam [coupled with opposition to Christianity and Judaism], support for the use of untested and unproven mRNA gene therapy drugs masquerading as CCP flu "vaccines" for political reasons rather than health reasons, etc.) while pretending otherwise, who is the actual anti-American.

Judas Iscariot

For a more detailed treatment, see Judas Iscariot.

According to the Gospel of John about Jesus's anointing by Mary Magdalene at Bethany:

“	Six days before the Passover, Jesus therefore came to Bethany, where Lazarus was, whom Jesus had raised from the dead. So they gave a dinner for him there. Martha served, and Lazarus was one of those reclining with him at table. Mary therefore took a pound of expensive ointment made from pure nard, and anointed the feet of Jesus and wiped his feet with her hair. The house was filled with the fragrance of the perfume. But Judas Iscariot, one of his disciples (he who was about to betray him), said, “Why was this ointment not sold for three hundred denarii and given to the poor?” He said this, not because he cared about the poor, but because he was a thief, and having charge of the moneybag he used to help himself to what was put into it. Jesus said, “Leave her alone, so that she may keep it for the day of my burial. For the poor you always have with you, but you do not always have me.”	”
—John 12:1–8

According to Seventh-day Adventist preacher and pastor Doug Batchelor in a sermon on March 20, 2021, Judas Iscariot, the Apostle who would betray Jesus, was exposed of his sinister nature to a greater extent in John's Gospel than the Synoptic Gospels, attributable to greater disdain towards him by John the Apostle.