Is the Rainbow evil?

The Pai people are afraid of the rainbow.  They believe the rainbow is very dangerous & must never be pointed at with your finger or looked at.  The rainbow may cause a person to be paralyzed or it may take a person or cause death.  When a rainbow is seen the person will begin to chop at it with a machete or draw a rainbow on the ground & then chop it to protect them-self from the rainbow.  The rainbow is evil & to be feared. 

Cenidia said to her husband Chito, ..It must be all lies that the missionaries are teaching us.  What they are teaching us isn’t what we have been taught.  When the big flood came Grandfather saved himself by climbing up into a palm tree & chanted. As long as he chanted the tree grew & he was saved from the flood. Grandmother drew a circle on the ground & stepped into the circle chanting, it floated like a tub & she was saved from the flood.  We have always been taught the rainbow is evil not a promise from God.