NF's can at times create conflict by being too emotional
or they can get passive aggressive by trying to avoid the conflict while in fact also contributing to it in a roundabout sort of way. Also NF's may be backstabbing because they dont like to confront so they can be hypocritical and fake and try to bring someone down rather than confronting them and getting their needs met.
You cant get your needs met if you don't ask for it. Also people wont respect you just because you are nice. Nice doesn't mean shit in this world so get over it. As long as you respect everybody you'll be fine. You don't have to be nice to everyone.
Not everyone deserves for you to be nice to them but everyone deserves respect. Also if you are always worrying about being nice how do you expect people to respect you if they dont even know where you stand on an issue. By not speaking up and avoiding conflict it makes things worse..