I used to believe Jesus was YHWH until I studied it out and found out how twisted the translations and supposed "proof-texts" were. Jesus literally says the only true God is his Father in John 7:3. He never claimed to be YHWH (http://lothealing.com/jesus-never-claimed-yhwh-god/) and his disciples all called him God's Christ (meaning the one who God had anointed).

In the John 8 quote you conveniently left out the fact that the next few verses have him saying "if I glorify myself my glory means nothing" which is him saying he wasn't glorifying himself as being greater than Abraham (and by default he wasn't glorifying himself as God either).

If you have to twist verses or add texts (like 1 John 5:7) to try to prove Jesus was YHWH, then it's probably not true, ESPECIALLY, when he said he wasn't (he said he didn't speak his own words, they were God's words). Also the disciples in Acts 4 say the creator of the heavens and earth has a son named Jesus. Jesus doesn't have a son named Jesus, but Jesus's Father has a son named Jesus. Thus, the disciples in Acts 4 said Jesus's Father was the creator of the heavens and earth.