Just for the record i wasn't being specific to deitary laws
"Jewish laws could have saved people, then there would have been no need for Jesus to save everyone, and thus there is no longer a need to follow old laws."
I am not sure i get this. So your saying people wern't following gods laws so he came back and said hey, forget about all those laws intead try these new ones(not in that context of course)
And if god knows what is going to happen before it happens then why would he hare created those laws in the first place. It just doesn't seem like something an all powerful and knowning god would do.
Also, the old testament is no longer relevent then why is it in the bible ?
The law was given to us to show us that we are not good enough for slavation. The entire OT forshadows the need for Christ. The law is given and the the heros of the faith Adam, Eve, Abraham, Sarah, David, and all the others are shown to sin against God. If these great people could not live without sin then no one can. The OT also shows us how much God loves us. In the OT God continually gives second and third and fourth chances to His people. And He finally shows us His ultimate love by giving us His son in the NT.
When Jesus came he clearly stated that the old laws are to be obeyed:
Matthew 5:
17: Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill.
18: For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
19: Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
20: For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
However Jesus got rid of many the laws, such as the food laws and sacrfice law etc. Jesus also changed or modified many laws. Therefore we are to follow all of the OT laws unless they are done away with, changed or modified in the NT. We follow God's law becuase we love Him, God's saves us by His grace alone and we obey Him out of love.