You don't know what you're talking about.
Mat 8:1-4 When he was come down from the mountain, great multitudes followed him. (2) And, behold, there came a leper and worshipped him, saying, Lord, if thou wilt, thou canst make me clean. (3) And Jesus put forth his hand, and touched him, saying, I will; be thou clean. And immediately his leprosy was cleansed. (4) And Jesus saith unto him, See thou tell no man; but go thy way, shew thyself to the priest, and offer the gift that Moses commanded, for a testimony unto them.
The "gift that Moses commanded" was an animal sacrifice.
Lev 14:1-7 And the LORD spake unto Moses, saying, (2) This shall be the law of the leper in the day of his cleansing: He shall be brought unto the priest: (3) And the priest shall go forth out of the camp; and the priest shall look, and, behold, if the plague of leprosy be healed in the leper; (4) Then shall the priest command to take for him that is to be cleansed two birds alive and clean, and cedar wood, and scarlet, and hyssop: (5) And the priest shall command that one of the birds be killed in an earthen vessel over running water: (6) As for the living bird, he shall take it, and the cedar wood, and the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird that was killed over the running water: (7) And he shall sprinkle upon him that is to be cleansed from the leprosy seven times, and shall pronounce him clean, and shall let the living bird loose into the open field.
Jesus followed the Law of Moses, including the animal sacrifices. And He taught Israel to do the same.
You are ignorant of the things that you speak of.