[tormeh]

>But don't Germany and France both have actual laws against offensive speech on the internet

So does the US. Try "I'm going to kill the US president" (maybe with a bit more specifics) and see how long you remain free. The US may have a bit freer speech than is normal, but there's no absolute free speech

[syshum]

You will stay freer longer than you would expect, you will get a visit from Federal agents but that comment is unlikely to raise to the level of a True Threat thus would be protected under the 1st amendment,

You may get added to watch lists, and federal agents may take a closer look at your life which could result in other charges or problems but it would not be that comment itself that violated US law