Are we still under OT law?

Matthew 5:17 ESV

“Do not think that I have come to abolish   the Law or the Prophets; I have not come to abolish them but   to fulfill them."

To what extent are you required to obey that which God commands of you, Beloved? How vast is his law to you? Does is span the length of the Jordan, then end? Or, does it flow from the lake of Gennesaret outward?  

See, Many of those who profess the Lordship of Jesus Christ think of his commands, from Matthew onward, as a “new thing”. Hence the term "New Testament"(a term which I have no problem with whatsoever, if properly understood)is very profitable to them. Conversely, those same men view those former commands, from Malachi backwards, as, well, "the old thing" - that which is to be discarded for that which is more..fashionable. 

The Old Testament is viewed by many professing Christians today to be obsolete -now made void. Yet, Christ here pronounces the exact opposite! Certainly, they reason, this must be understood a different way,because no man in his right mind thinks those under the blood of Christ should dare trample that blood by sacrificing lambs and doves. Well, his reasoning is certainly correct. It is what he concludes from that reasoning that is error.

They assume that the law is to taken as one whole. They then throw that which has passed away out with that which is still valid. The law is to be understood by a division of moral, ceremonial, and civil sanctions. God has DONE AWAY with the ceremonial aspects of the law through Christ’s sacrificial death, those civil laws are also done away with the nation of Israel (the general equity of thereof still binding).

The MORAL aspect of the Mosaic Law is STILL BINDING. They are as timeless as God is. Our infinitely holy God’s view of morality does not change. Should we assume that God’s view on sodomy will change someday? Of course not!

Let me ask you something:

Exodus 22:19 ESV

“Whoever lies with an animal shall be put to death.”

Does God still view bestiality negatively? If you don’t believe the OT moral law is still binding then you can’t say so definitively. If he views it negatively, isn't a man having relations with, say, a cat a sin?

Christians must STOP denying Christ by rejecting the Old testament and understand its proper application in Christian living today. Without so we displease God by neglecting to obey his commands. I know first hand that many things are hard to understand, but we must apply ourselves to understanding Gods's will for the church in American and as a whole.