Upvote:0
It's kinda simple logic: if guru does something that is ultimately beneficial, but in your confusion you think it's wrong, then by denying the guru you are shutting the door to that goodness, hereby creating bad karma.
If guru is bad then you're not. But how do you know, if by definition he is the more enlightened, not you, so how can you have capacity to correctly judge him?
In Vajrayana "type of Buddhism" there is unique situation when the guru may do crazy stuff on purpose to provoke you and create the teaching moments. So in that school it is even harder to trust your guru but also that much more important to trust, so you two can keep working.
In other "types" it's simpler in the sense that you can follow basic guidelines like the guru is not supposed to do anything immoral, so that makes it easier to identify what's what.
Upvote:0
This is a complex subject and I will defer to those who practice vajrayana, but from what I understand it is the giving up of vows that incur the very heavy karmic cost.
Briefly, when someone with full understanding of what they are getting into, chooses to take the vajrayana vows with regard to a particular guru, then if they break those vows ... there is very heavy karmic cost.
The solution is simple: if you are at all unsure - whether the guru might be bad, whether they have your best interest at heart, whether you are capable of keeping the vows, whether they are capable of keeping the vows, whether the vows are worth keeping even if the guru manifests utterly reprehensible non-dharmic behavior... donβt take the vows. Period.
Trouble comes when the student and/or the guru are not ready. So be ready and completely sure you are ready and your guru is ready before you embark.
Upvote:1
Heavy bad kamma is always a matter of strong wrong view, and ingratitude is such especially if it's toward real and lasting help: Toward one's Gods, Parents, people of goodness.
It's how ever not bad if based on right view and if the relation is a more or lesser good trade with the world, it would be even good to seek for leaving, correct of course and not just for another similar way.
[Not given for trade, exchange, stacks and what ever relations not dedicated toward real liberation]