Contradiction with Matthew 28:19
2 Timothy 4:19 mentions greeting individuals, whereas Matthew 28:19 emphasizes going to all nations.
Matthew 28:19: Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: [teach...: or, make disciples, or, Christians of all nations]
Contradiction with Titus 3:10
2 Timothy 4:19 sends greetings to harmonious workers, while Titus 3:10 advises to reject a divisive person after a first and second warning.
Titus 3:10: A man that is an heretick after the first and second admonition reject;
Contradiction with 1 Corinthians 15:33
2 Timothy 4:19 shows positive community interaction, while 1 Corinthians 15:33 warns against being deceived by bad company.
1 Corinthians 15:33: Be not deceived: evil communications corrupt good manners.
Contradiction with John 13:34
2 Timothy 4:19 involves individual commendation, whereas John 13:34 commands love for all disciples as a whole.
John 13:34: A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.
Contradiction with Acts 15:39
2 Timothy 4:19 features friendly greetings, whereas Acts 15:39 describes a sharp contention between Paul and Barnabas.
Acts 15:39: And the contention was so sharp between them, that they departed asunder one from the other: and so Barnabas took Mark, and sailed unto Cyprus;