Oh /u/moon-worshiper, how can you be so wrong? Let me count the ways.
TMT has become a race issue, to the point the science importance is being used as an excuse for white racism against the locals.
Only for the anti-TMT people, who all seem to be secessionists who view everything through the lens of race, unfortunately. Astronomy is one of the most international sciences in the world (next to high energy physics, I'd say). It brings together people of different races, nationalities, genders, political alignments and other things that usually divide people. The locals are not excluded, as evidenced through the THINK Fund, the training of Native Hawaiian astronomers, and through the great pains TMT took to be culturally sensitive. (1)
The assembly will be done by teams of mainland experts, not construction workers.
There will be local construction workers, which is why the unions endorse the TMT. Specialized construction like the optics will have to be done by people from out of state. If you want people from Hawaii to do this kind of work though, you have to allow things like the TMT to be built here so there are opportunities for people to get interested and trained. Otherwise don't complain when they use mainlanders for specialized work you can't get done in Hawaii. (2)
It will take 2 years more to get it all checked out before "first light". That means 12 years before any big hiring. That is a long time to wait for a hypothetical job.
Do you think the jobs will magically appear and reappear over night? I'll try to explain to you how this works, and hopefully this time you'll listen. The construction work will take place over several years. During that time the TMT collaboration will be preparing the optics, electronics, and software. This is usually done by universities professors, and graduate students who might do this as part of their Masters or PhD degrees. When everything is done, it will all be integrated and first light will be achieved. No one will be waiting for any jobs. Jobs are being filled and work is being done right now. Please educate yourself on how scientific collaborations work. (3)
Time to lose all the sour emotions.
No one has sour emotions except the anti-TMT people.
TMT will do just fine in the Canary Islands
It will but not as well as it would do on Maunakea.
In the meantime, Robotic Space Telescope Observatories will be making giant ground-based optical observatories obsolete.
No they absolutely will not. Where are you getting this information? Gunther Hasinger, IfA director, talked about exactly this at the hearing and explicit said space-based telescopes will not make ground-based obsoletely anytime soon, if ever. This is at least the third time you've said this without evidence. Put up or shut up. (4).
That is something else science does, make the outdated go obsolete, and that includes people.
The only things that are obsolete are the politics and superstitions that retard scientific progress.
I've counted 4 ways you've been wrong in this post alone. I'd love to see you address them, with citations, if you can.