Between 2013 and 2021 white mass shooters were responsible for about 1079 deaths. In 2020 blacks were responsible for the deaths of about 500 whites. That means that blacks kill as many whites in 2 years as white mass shooters in 8 (and without even taking the race of the victims into account for the latter).

I echo the sentiments of the other people who replied to you, your logic is wrong and plays into leftist narratives, if not outright shilling/bad faith. The black-on-white homicide rate is so astronomically larger than the reverse that anyone who tries to talk to you about white mass shooters as a serious issue without addressing the black crime rate is either brainwashed and ignorant, or operating in bad faith.