Re the alleged Gorbachev Institute meeting about "trash people" needing to be eliminated, I've read the same thing supposedly attributed to the Bilderbergers. "Everybody wants us dead, dead, dead!" I somehow doubt anyone of Baroness Thatcher's stature would lend her name to any sort of enterprise as that.
Remember, PM Thatcher supposedly got pushed out of leadership of the Conservative Party because she wouldn't kowtow to the Bilderbergers' demand for currency union with the EU, which would have meant the end of sterling and an important attribute of British Crown sovereignty. Thatcher said no, and (supposedly) the Bilderbergers then solicited a dog that'd eat a dog within the Tory Party to move her out.
So we are asked to believe that Maggie Thatcher, who scrupled at concessions of Crown sovereignty, would go along with the planned destruction of most of the British people? Please. That is an awfully thick, gristly steak we are asked to choke down.
a. The reference to the Gorbachev group's plans for megacide tends to throw a shadow over both the veracity of the information referred to, and therefore the authenticity of the speech as transcribed.
b. Therefore, corroboration of the third linked speech is very much needed, particularly given its grim and galvanizing implications, if true. It is a documentation of megalomania and monstrously mega-murderous intentions toward the People of the United States, IF (as you say) the third speech is genuine. The incorporation by reference of a ghastly plot by the Gorbachev Foundation seminar participants makes it less likely that the third speech is genuine.
Politics is a strange amalgam of fear, hope, cynicism, and bluff, with a goodly measure of lies thrown in, whose composition changes according to the audience and the situation.
Cheers!