Discover your boundaries, set your boundaries and make them known to people you interact with. Someone accidentally crossing a boundary or not being aware of the boundary while crossing it, might be OK after a respectful discussion. Someone knowingly and intentionally crossing a boundary is disrespectful. Feel free to harshly remove such a person from your life.
Honesty can only exist by respecting the answer. It’s unfair to ask for honesty and then be disrespectful to the answer. You can still disagree, but this is their valid view they just told you. A fun phenomenon appears when you respect a person and find a conflicting view, you’re inclined to find reasons for their view. It’s not because of their stupidity, because you respect that person. They must’ve learnt it for a reason. Discovering their reasons will make you grow.
Respect is also about recognising when you’ve crossed somebody’s boundaries and offering sincere apologies. Say sorry whenever you’ve made an error and you’ll probably be forgiven. Sorry can lose its meaning when you freely deal it out everywhere you go. Use it sparingly in situations where it is you that has done something wrong, and you feel remorse that you want to share with the other person. “I’m sorry that you feel that way,” is not an apology, as you make it their wrongdoing instead of your own. Neither is using sorry as a tactic to quickly walk away from the consequences.