Malachi 1&2 - When you honor the heavenly Father your way and not His; you are despising Him. 2016

Mal 1:7
"You are presenting defiled food upon My altar. But you say, 'How have we defiled Thee?' In that you say, 'The table of the LORD is to be despised.'

Mal 1:8
"But when you present the blind for sacrifice, is it not evil? And when you present the lame and sick, is it not evil? Why not offer it to your governor? Would he be pleased with you? Or would he receive you kindly?" says the LORD of hosts.

They are bringing defiled creatures for offerings to Elohim. They were bringing creatures that are lame and sick, which was prohibited.

Deut. 15:19-21 “You shall consecrate to the LORD your God all the first-born males that are born of your herd and of your flock; you shall not work with the first-born of your herd, nor shear the first-born of your flock. 20“You and your household shall eat it every year before the LORD your God in the place which the LORD chooses. 21“But if it has any defect, such as lameness or blindness, or any serious defect, you shall not sacrifice it to the LORD your God.

Elohim points out that if they made such an offering to their governor, he would not be pleased at all. They had taken an oath a few years earlier that they would bring in proper tithes and offerings as stated in Torah.

Neh. 10:34-37 Likewise we cast lots for the supply of wood among the priests, the Levites, and the people in order that they might bring it to the house of our God, according to our fathers’ households, at fixed times annually, to burn on the altar of the LORD our God as it is written in the law; 35and in order that they might bring the first fruits of our ground and the first fruits of all the fruit of every tree to the house of the LORD annually, 36and bring to the house of our God the first-born of our sons and of our cattle, and the first-born of our herds and our flocks as it is written in the law, for the priests who are ministering in the house of our God. 37We will also bring the first of our dough, our contributions, the fruit of every tree, the new wine and the oil to the priests at the chambers of the house of our God, and the tithe of our ground to the Levites, for the Levites are they who receive the tithes in all the rural towns.
Mal 2:2
"If you do not listen, and if you do not take it to heart to give honor to My name," says the LORD of hosts, "then I will send the curse upon you, and I will curse your blessings; and indeed, I have cursed them already, because you are not taking it to heart.

Elohim says that if the priests do not take His Torah to heart, He will turn their blessings into curses.

Deut. 28:15-19 “But it shall come about, if you will not obey the LORD your God, to observe to do all His commandments and His statutes with which I charge you today, that all these curses shall come upon you and overtake you. 16“Cursed shall you be in the city, and cursed shall you be in the country. 17“Cursed shall be your basket and your kneading bowl. 18“Cursed shall be the offspring of your body and the produce of your ground, the increase of your herd and the young of your flock. 19“Cursed shall you be when you come in, and cursed shall you be when you go out.

Jer. 6:16-20 Thus says the LORD, “Stand by the ways and see and ask for the ancient paths, Where the good way is, and walk in it; And you shall find rest for your souls. But they said, ‘We will not walk in it.’ 17“And I set watchmen over you, saying, ‘Listen to the sound of the trumpet!’ But they said, ‘We will not listen.’ 18“Therefore hear, O nations, And know, O congregation, what is among them. 19“Hear, O earth: behold, I am bringing disaster on this people, The fruit of their plans, Because they have not listened to My words, And as for My law, they have rejected it also. 20“For what purpose does frankincense come to Me from Sheba, And the sweet cane from a distant land? Your burnt offerings are not acceptable, And your sacrifices are not pleasing to Me.”