Buntaro said:
I think there is a difference between a religion and a cult. A cult focuses on just person - the founder of the cult. A "religious" group could have a founder, but the founder would make sure that the focus is on a higher ideal, not himself or herself.
According to your definition the whole of Christianity is a cult, then. They pretty much focus on one person: Jesus.
A cult can also focus on things or idea(l)s, I think. Really it's all a matter of definition. From M-W:
1 : formal religious veneration : WORSHIP
2 : a system of religious beliefs and ritual; also : its body of adherents
3 : a religion regarded as unorthodox or spurious; also : its body of adherents
4 : a system for the cure of disease based on dogma set forth by its promulgator <health cults>
5 a : great devotion to a person, idea, object, movement, or work (as a film or book); especially : such devotion regarded as a literary or intellectual fad b : a usually small group of people characterized by such devotion
& while I'm at it, also from M-W, the definition of sect:
1 a : a dissenting or schismatic religious body; especially : one regarded as extreme or heretical b : a religious denomination
2 archaic : SEX 1 <so is all her sect -- Shakespeare>
3 a : a group adhering to a distinctive doctrine or to a leader b : PARTY c : FACTION