"But avoid foolish controversies and genealogies and arguments and quarrels about the law, because these are unprofitable and useless." - Titus 3:9.
Avoid genealogies.....? So does that mean we should skip Matthew 1 and Luke 3, because they're unprofitable and useless?
"For God is not a God of confusion..." - 1 Corinthians 14:33.
Ijaz Ahmad is misreading the text. It is not saying genealogies in and of themselves are useless, the point that Paul is making is not to waste time with heretics who refuse to be corrected:
"9 But avoid foolish controversies and genealogies and arguments and quarrels about the law, because these are unprofitable and useless. 10 Warn a divisive person once, and then warn them a second time. After that, have nothing to do with them. 11 You may be sure that such people are warped and sinful; they are self-condemned."
The genealogies that Christians should be concerned with are those of Jesus' family trees, because they are relevant to the Gospel themselves. Paul is not talking about skipping Matthew 1 or Luke 3, nor is he saying they are useless. He is saying "If an individual isn't going to heed your warning or accept correction, don't bother continue arguing with him."
Also, the phrase "God is not a God of confusion" is talking about orderly worship, NOT God in general:
"1 Corinthians 14:26 What then shall we say, brothers and sisters? When you come together, each of you has a hymn, or a word of instruction, a revelation, a tongue or an interpretation. Everything must be done so that the church may be built up. 27 If anyone speaks in a tongue, two—or at the most three—should speak, one at a time, and someone must interpret. 28 If there is no interpreter, the speaker should keep quiet in the church and speak to himself and to God.
29 Two or three prophets should speak, and the others should weigh carefully what is said. 30 And if a revelation comes to someone who is sitting down, the first speaker should stop. 31 For you can all prophesy in turn so that everyone may be instructed and encouraged. 32 The spirits of prophets are subject to the control of prophets. 33 For God is not a God of disorder but of peace—as in all the congregations of the Lord’s people.
34 Women[f] should remain silent in the churches. They are not allowed to speak, but must be in submission, as the law says. 35 If they want to inquire about something, they should ask their own husbands at home; for it is disgraceful for a woman to speak in the church.[g]
36 Or did the word of God originate with you? Or are you the only people it has reached? 37 If anyone thinks they are a prophet or otherwise gifted by the Spirit, let them acknowledge that what I am writing to you is the Lord’s command. 38 But if anyone ignores this, they will themselves be ignored.[h]
39 Therefore, my brothers and sisters, be eager to prophesy, and do not forbid speaking in tongues. 40 But everything should be done in a fitting and orderly way."
It is the subject of proper and right worship that Paul is talking about.
Hope this article helps