Truth I'm really not sure about that. Loving your neighbour as yourself is the second most important command and that comes from Jesus .
1 John says
" we know that we have passed from death to life because we love each other ........ dear children let us not love with words or speech but with actions and truth. ......
This is how we know that we belong to the truth and how we set out hearts at rest in His presence. "
So we can't be horrible to people and get a free pass by just saying the right thing.
As to the Trinity , yes some of the Early Church Fathers believed that when OT people said that they had seen God because the Bible says that no one has seen the Father then they must have seen God the Son .
One of them wrote a whole article on this called something like " A Conversation with Trypho a Jew . " in which he has a conversation with the said ( imaginary ) Trypho about the sightings of God in the OT .
Jan