How can you love the Father without the Son? And how can you love the only-begotten Son, without also loving the Father, since they are one in Spirit (Jn 17:22-23)? It is the Son who reveals the Father (Mt 11:27), but it is the Father who draws us toward the Son (Ps 110:1).
Moreover, the Son lives in the Father’s Heart, while the Father lives in His Son, through the Spirit. You cannot have one without the other. Who rejects the Father, rejects the Son, and who rejects the Son as the only-begotten of God, rejects the Father who begot Him.