Islam? I think the atheist communists like China and Russia are a much bigger threat.

Vulp, idk where you are getting this from, but that isn't right

Russia is not athiest, they have a higher percentage of the population identifying as christian than the USA.

https://www.state.gov/reports/2020-report-on-international-religious-freedom/russia/

Also Russia hasn't been communist been 1991, they are very capitalist.

https://www.piie.com/publications/policy-briefs/russias-economy-under-putin-crony-capitalism-state-capitalism

https://www.historyonthenet.com/is-russia-communist

China isn't communist anymore either, regardless of what the ruling party wants to call themselves - they have a market economy, not one that is centrally planned, and they pay a lower tax rate than the US

https://www.cato.org/policy-report/january/february-2013/how-china-became-capitalist

https://www.csis.org/analysis/chinese-state-capitalism