This is a snippet from Peter B. Gillis' "What If...? #44 - What If Captain America Were Not Revived Until Today?", published in 1984, with art by Sal Buscema, Dave Simons, and George Roussos, and lettering by John Morelli.
For context: the story deals with an alternative history where Captain America remained frozen for longer, while the US slowly sunk into far-right regime reminiscent of Nazi Germany, with a clear racist sentiment on the rise, corrupt politicians that demonised and restricted the civil liberties of minorities, and with a fake Captain America supporting this status quo.
The comic book ends with the actual Captain America delivering this speech as a wake-up call on the dangers of extreme nationalism that is based on hate and the oppression of others, and the fragility of freedoms that have already been established, especially when hateful ideologies are allowed to fester.
'An Alternate Reality Captain America Turns Around a Corrupted America'
https://www.cbr.com/captain-america-what-if-thawed-out-today/