All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
A person does not become a disbeliever by committing a sin even if he does it openly and boasts of it, unless he believes it to be lawful.
Committing a sin openly while believing that it is forbidden does not entail that one deems the sin lawful.
You should have quoted to us the statement of Shaykh Ibn 'Uthaymeen or informed us its source so that we could elaborate on it.
Hatred or suspicion are not acts that take a person out of the fold of Islam; rather, they are sins.
Loving the sin in a natural manner, in a way that a person desires it and wants to do it while he hates it Islamically and knows that Allah has forbidden it is not something that takes a person out of the fold of Islam.
It seems to us that you are affected with whispers in this field, so we recommend that you repel them, and not pay any attention to them because giving in to them leads to a great evil.
Allah knows best.