hi there,
this is not true. it is completely false and misleading. there have been many studies that have proven that there are not only two 'genders' and that it cannot be boiled down to this false opinion. your source is from a tweet. not only that, but your source is from a trump Trump-supporting Twitter page. Trump is a man notorious for spreading false information and lies, he built his entire campaign on lies. Also, gender and sex are two separate things. According to Merriam-Webster, gender is "the behavioural, cultural, or psychological traits typically associated with one sex". If you were attempting to argue that there are two genders, you'd be incorrect twice. Gender is not the biological sex assigned at birth, it is the traits that we are associated with based on our biological sex assigned at birth.
https://www.merriam-webster.com/