This is not true according to my religion.
The fact that the Tanach is part of the Christian Bible only means that they are relying on the authenticity of the Tanach to lend their own Bible authenticity. It doesn't mean that this is an effective method of creating an authentic religion of G-d. If I steal your patented idea, but add a few things to it, does that make me less of a thief?
Again, the concept of peace is understandable and universal. That is not what I have a problem with. Its your assumption that your religion's theological ideas have importance to me.
Judaism is considered legitimately revealed by G-d to Jews.
Judaism and Christianity are considered legitimately revealed by God to Christians.
Judaism and Christianity and Islam are considered legitimately revealed by Allah to Muslims.
Judaism, Christianity, Islam and Baha'i are considered legitimately revealed by Baha to Baha'i.
Do you see how that works?
I'm Jewish.
Because you chose to bring your theology into what should have been a universally phrased statement. Your religion is not universally accepted. So by bringing it up, you are limiting the scope of people that will relate to your ideas. When you want to make a universally accepted statement, its best to couch it in universally accepted terms.
Which brings us to me here, disagreeing with all the elements of your OP that are not universal.
Or, to address independently your first objection, they either built upon the foundations laid by Judaism or they tell the same stories in different ways. In either case, they acknowledge those influences in very significantly positive ways. The early Christians, including Paul the Apostle, having been DEVOUT JEWS, would have regarded the Tanach as their “Bible”. It was only after the mass conversion of Gentiles that a New Testament was added. Also, what are you implying by the hypothetical question that you ask? Do you dare imply that the later three religions are plagiarisms? That Christians, and by extension, Muslims and Bahá'ís stole from y'all, without giving due credit? God forbid! To answer your question, if it's not hypothetical, if you don't acknowledge my influences on your invention, but rather claim them as your own influences, THAT is theft.
My religion doesn't have to mean anything to you. If what I'm ultimately saying strikes a chord with you, then this post has served its purpose.
You're Jewish, which is absolutely wonderful, Tumah! When you say that Bahá'ís believe in Judaism, Christianity, and Islam are considered divinely revealed Religions, you 100% speak the truth. I'm Bahá'í, so anything that I'd say or post or write is, ultimately, going to be coloured by my faith (which, BTW, is built on the very same foundations as the other two: those of Judaism), so my apologies if my speaking from my own perspective has caused any sort of discomfort for you.