What percentage of Christians think it is okay to lie to someone to trick them into attending a religious?

Lying about such a thing is unacceptable to any moral person, Christian or otherwise. If there is a percentage of Christians who think that this type of approach is okay, it would be a very small percentage. You don't lie to a parent about something involving their children, especially when it comes to matters of religion. And it's not just a Christian issue. If someone attempted to get my children to attend a non-Christian spiritual event while trying to disguise it as something else altogether, I would definitely have a few words for that person. Regardless of the religion involved, it is something that no honest person would do.