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It's a sect. The cult followers use the symbol of a cross, AN INSTRUMENT OF TORTURE, to identify their belief system. You would think if the were interested in peace a symbol of a dove or something like that might be more appropriate.

Well, technically a "sect" is a smaller subset ("section") of a larger religious group. Since nearly all current self-described "Christians" use the cross at least some times to represent their faith, that doesn't seem accurate.

But the over-all case against "official" Christianity as a religious, rather than political, movement is pretty strong. The use of the cross as a symbol for the doctrine itself actually cannot be traced earlier than the 8th century, which is about 4 centuries after the enforced adoption of Christianity as the official religion of the Roman Empire. Though the manner of Jesus death was known, it wasn't considered a suitable way to symbolize the movement itself by the early (genuine) Christians. Instead they used the fish sign because the letters of the word "ichthys" in Greek form an acrostic, or they used a picture of Jesus as "the good shepherd" carrying a lamb across his shoulders. The significance of the "instrument of torture" (instrument of brutal execution, actually) used as a symbol by an office of the state which invented it is not hard to recognize. But of course it was no longer suitable for use in enforcing obedience since it had become a paradoxical "religious symbol" and would elevate any new victims rather than disgrace them. Other methods such as public burning were adopted for punishing the disobedient and intimidating any other potential resistance.