It's not about believing Trump. It is about not believing Democrats and their enablers in the media.
When the vote tally is higher than the number of registered voters, it causes one with a scintilla of intelligence to question the results.
When more voters (154.6 million) turned out for the presidential election in 2020 than in 2016 (137.5 million), the largest increase between consecutive presidential elections since the inception of the CPS voting supplement in 1964, it causes one with a scintilla of intelligence to question the results.
When there were 168,300,000 registered voters and total votes cast in the 2020 election was 158,431,190, which suggests that NINETY-FOUR point ONE % of registered voters actually voted, a number unheard of American politics, it causes one with a scintilla of intelligence to question the results.
https://www.census.gov/content/dam/Census/library/publications/2022/demo/p20-585.pdf
https://www.nbcnews.com/politics/2020-elections/president-results/
When you have jurists on the bench changing election law in the middle of an election for specious reasons, it causes one with a scintilla of intelligence to question the results.
When at 1:00 a.m. Trump has a million vote lead in PA, then by the end of the week thanks to jurists insisting to keep counting votes violating state laws, it causes one with a scintilla of intelligence to question the results.
When a dumb, senile old dunce who barely campaigned and couldn't fill an auditorium with supporters gets 17 million votes more than the much more popular Obama, it causes one with a scintilla of intelligence to question the results.
When a dumb, lying senile dunce gets 7,059,526 more votes than Trump, after Trump bettered his successful Presidential bid in 2016 by 11,239,147 votes, it causes one with a scintilla of intelligence to question the results.
Any other asinine questions?