You may not understand some things about the Trinity. And you may misunderstand and reject some strawman argument OR even reject some not too good presentation of a doctrine. But to confess the Son is to have the Father also.
Sure a man may possess the Father and the Son and indeed cannot have possession of One without the Other and not be conversant about a doctrinal discussion (rejecting what he thinks he understands as it ).
You can see why the question is not simple to answer Yes or No and nothing ELSE. And you should appreciate that SOME questions are like that without being suspicious that someone doesn't WANT to give you an answer.
Anyway, you should see from
First John 2:22 in John's mind to believe that Jesus is the Christ is to NOT deny
"the Father and the Son".
Having said that I would now ask you something. Paul wrote that it was God's desire that all men be saved and come to the full knowledge of the truth.
" ... our Savior God, Who desires all men to be saved and to come to the full knowledge of the truth." (1 Timothy 2:3b,4)
Which do you think we should persue eventually?
1.) Just to be saved to meet our desire.
2.) Afterward come to the full knowledge of the truth according to God's desire as well.
I think we should desire to be saved ... AND to come to the full knowledge of the truth as God's desire. And that would certainly include the immediately following -
" .. who desires all men to be saved and to come to the full knowledge of the truth. For there is one God and one Mediator between God and men, the man Christ Jesus." (v.5)
That's the Triune God - the Savior God and the Savior man Jesus Christ the one Mediator between God and men. That is the Trinity.