I don't even know what halal meat is and I'm definitely not a vegetarian although I did try it once. There are'nt any special dietary requirements to be a Jehovah's Witness outside of abstaining from blood in any form.
Newsflash, all meats have blood in them. Halal meat drains the blood, not 100% mind you, but close to it. Similar to Kosher meat. If you are supposed to abstain from blood in any form, you should not be eating meat.
I'm assuming when you say idolising you're referring to the practice of worshipping an image or representation of God which is forbidden in the bible. However a Kingdom Hall is simply a building used for worship, similar to a mosque, church, temple, synagogue, etc..
I consider all forms of building in God's name idolising. God can hear you from anywhere. Why the building? Isn't the money better spent helping the poor or spreading his word?
That's a good question which involves knowing a bit of history. I'll try to explain it without going into a lengthy discussion. But basically when Christ arrived in the first century he changed things up a bit in the sense that the Israelites were no longer God's only favored people or nation. In the Old Testament portion of the bible the Israelites had a special contract (or covenant with God) that made them exclusively his people. However due to the Israelites constant sins and repeated violation of their covenant, when Christ came to Earth that covenant was no longer valid. Jesus then instituted a new covenant which allowed any person regardless of race or nationality to have a relationship with God similar to what the Israelites had. This was the birth of christanity as it was Jesus who introduced these changes and he set the standard for others to follow. Some years after Jesus died the original congregations during that time became infected with various pagan teachings and true christianity was scarce. Then there was a period of time when owning or discussing the bible in private was considered illegal and this of course had far reaching effects on what the general population know or belived about God and Christ. C T Russell was one of the first people in modern history to make a genuine attempt to adhere strictly to the bible's counsel and cast off some of the pagan practices that became associated with christianity. Initially Russell and his congregation referred to themselves as simply bible students, but in time they took on the name of Jehovah's Witnesses based on the scripture text at Isaiah 43:10 (You are my witnesses,? is the utterance of Jehovah, ?even my servant whom I have chosen, in order that YOU may know and have faith in me, and that YOU may understand that I am the same One. Before me there was no God formed, and after me there continued to be none). Hopefully that was'nt to drawn out but it provides a brief background of how Jehovah's Witnesses come to use that name.
Jehovah's Witnesses accept the entire bible, not just parts of it. However there are portions of the Old Testament that were done away with when Christ instituted the new covenant. For example we don't practice animal sacrifice, wearing blue fringes on our clothing, stoning murderers, etc.. I think this is why some people have problems with the bible, they think that parts of the Old Testament are still being observed down to the letter. In regards to your comment about the Trinity, there are quite a few scriptures that illustrate why the Trinity worship is not an accurate bible truth. If you like I can show you some verses if you wanted to research for yourself.
So, just another version of "we are the true children of Israel"