Other paths may state that there is a being who can sidestep the law of kamma and provide for one’s happiness without one’s having to master the skills of the noble eightfold path, or that certain ritual actions or words can provide a similar shortcut to happiness.

"Buddhism’s basic premise is the principle of kamma, that happiness and suffering are the results of one’s own past and present actions. The noble eightfold path grows out of this principle as the most skillful mode of action for escaping from the cycle of kammic retribution and attaining the Deathless. Other paths are either incomplete expressions of the noble eightfold path or are based on other principles. For example, they may state that there is a being who can sidestep the law of kamma and provide for one’s happiness without one’s having to master the skills of the noble eightfold path, or that certain ritual actions or words can provide a similar shortcut to happiness. People who follow either of these two latter beliefs could well feel threatened by outsiders who do not share their beliefs, for the outsiders are in effect denying the existence of a shortcut on which the insiders are placing their hopes. This explains why such people have often been intolerant of outside views.

But because the principle of kamma is a teaching of full personal responsibility, no one who believes in kamma will feel threatened by people who teach shortcuts around kamma. Buddhists who have yet to attain stream-entry may waver in their conviction — as the path can seem long and arduous, and the results slow in coming — and this is one reason why they are encouraged not to associate with anyone who rejects the principle of kamma. But those who have had their first taste of Awakening can in no way be persuaded to doubt the principle, for they have seen that the Deathless can be touched only through a process that requires the utmost skill in mindfulness and discernment applied to the processes of one’s own mind. Their attitude toward other teachings is that of a skilled artisan toward those with lesser skills, or of a woman who has learned how to extract sesame oil from sesame seeds toward those who are still trying to extract it from gravel: she will want to teach them the right way if they are willing to listen, but if they are unwilling, she will tolerate their ignorance and hope that someday they will be ready to learn."

~ Thanissaro Bhikkhu "The Wings to Awakening"