It's certainly not anti-semitic to discuss it and it's been discussed many times on here. Occasionally people have overstepped the mark though and they've been sanctioned. I can assure you, after many discussions in the Mod forum, that Ric is very careful about being too reactive and will give people more than a fair chance to speak their minds. That's not always gone down well with me but he's right far more times than he's wrong.
But to answer some of your points, which are a little inaccurate. The region was Ottoman-controlled territory for hundreds of years, who were Turks not Arabs. The last self-governing (what we would now call sovereign) state on that territory was undoubtedly a Jewish one.
Secondly the UK didn't exactly give Israel the green light. They simply handed the problem back to the UN and actually abstained in the Partition vote. In fact the Russians proabably had more to do with its creation than anyone else as they saw a chance to embarrass the UK and create a rift between us and the USA so they and their satellites in the Soviet Union fully supported the resolution. It wouldn't have been passed otherwise. Resolution 181 was non-binding (as most UN resolutions are) but the Jews decided to declare a state on their territory while the Arabs around refused to accept it. As a consequence, Arab armies attacked as soon as the Israelis announced statehood and this triggered the 1948 War of Independence. It was that war that caused the displacement of so many Arabs not the creation of Israel in itself.
Had the Arabs accepted Resolution 181 they would have had a far bigger territory than they have now or could hope to get now. Had those Arab armies won the war in 1948, there still wouldn't have been a Palestinian state as their well-documented intention was to absorb the territories into Syria & Egypt. They may well have fought each other over that subsequently. Once that war was over and international boundaries finally agreed and established, Jordan could have created a separate state in the West Bank but it annexed the territory, then lost it in the Six Day War. Egypt didn't annexe Gaza but it was effectively under Egyptian military rule. Again, they could have created a separate state but didn't.
So it's not quite a simple as "Israel stole the land from the Arabs".