This is a very stupid and dangerous lie.

And it is very easy to debunk.

https://en.wikipedia.org/wiki/List_of_Islamist_terrorist_attacks

Between 1993 - 2019 Islamist terrorists killed over 3000 people and injured over 7000 people in the U.S.

No other domestic terrorists have killed or injured that many people in the U.S. in the years 1993 - 2019.

https://en.wikipedia.org/wiki/Islam_in_the_United_States

Muslims are 1% of the U.S. population.

What does this mean?

It means that Islamist terrorists are per-capita the deadliest domestic terrorist threat in the U.S.

Keep that in mind the next time you hear the mainstream media and the Biden administration warning everyone about "right-wing White supremacists".