WW3 will be information warfare and it's probably already started, the free press in the west are not free they have chosen a side.
Corporations will not criticise China throwing people into camps because they are scared to lose a massive market but at the same time domestically (where they can't be banned from operating due to rule of law) they are pushing the message that the most diverse and welcoming countries in the world are also the most racist. They pushed Russia collusion conspiracy for 3 years with almost 24/7 coverage but won't report on Joe Biden's dodgy dealings exposed on Hunter Biden's laptop, even gone as far as to censor it.
https://en.wikipedia.org/wiki/Irregular_warfare
In other words if you're a hostile nation it's better to attack the United States with groups like BLM and Antifa than to try to launch a military assault which will provoke a military response and also make you look like the aggressor.