It is a basic principle of Bible interpretation that Scripture does NOT contradict Scripture. When an apparent contradiction is found, it is necessary to look for another reading, consistent with common usage, that resolves the conflict. There will ALWAYS be one.
Ex 20:12
12 Honour thy father and thy mother: that thy days may be long upon the land which the Lord thy God giveth thee. KJV
Luke 14:26
26 If any man come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple. KJV
Hate usually means detest or despise. However this reading is at variance with Ex 20:12.
A secondary meaning of hate in Elizabethan English was to love less or to regard as less important or worthy.
While this meaning has fallen into disuse, it resolves the conflict and is the preferable reading.