Nope, the first amendment is still relevant.
Absolutely.
There should be extensive background checks on speech, and a person has to show they can handle speech safely.
If they pass the background check, an IQ test should be given before their speech should be allowed in public.
Even Heller recognizes that a militia having small arms is useless in modern day.
I live in Chicago, that's hilarious!
It may well be true today that a militia, to be as effective as militias in the 18th century, would require sophisticated arms that are highly unusual in society at large.
The right to bear arms existed before the Founders had the need for a militia.