The United States now enters the phase of mass executions.

[awty]

2 executions in one day in a country is not 'mass' anything.

The title is indeed misleading.

I am not too far off.  On December 26, 1862, the United States government, under the orders of President Abraham Lincoln, hanged 38 Dakota tribe Indians:

DPIC -- The Largest Mass Execution in US History

And, so, it does not take 81 prisoners to constitute a "mass execution", as the DPIC website is not the only one to use the phrase "mass executions".  I will concede that 2 in one day, or even 3 in one day may not be a "mass", but would 38 in one month constitute a "mass execution"?  In any case, even if States were to execute 50 individuals per month, it will still take over four years to clear the various death rows.  Perhaps a better OP title would have been "execution spree", and so, if you want to change it to that, that would be okay with me:

The Hill -- Oklahoma’s planned execution spree underlines death penalty’s errors

I don't know about you, but I am not currently living in 1862.