It’s true, most of your comments seem to have a positive upvote score and therefore more upvotes than downvotes. Your Yale comment seems to have attracted the most downvotes in recent time, currently “-14” “upvotes”/points (seems that some lemmy clients just call them “points”)
So actually it seems that currently Lemmy itself doesnt support showing one users total upvotes/downvotes as this would very much resemble the reddit Karma system and they dont want that.
However as all your comments and the total sum of votes for each comment(I think also the bare numbers of upvotes/downvotes are visible via Api access) are public one could theoretically write a script or build this into a Lemmy client. However the 3 clients I just used to test this don’t support this and probably don’t want to.
I was also sceptical but it seems to be generally true, however the details of it are way more complicated. Read for yourself if you know German or use a translator, one of the biggest Berlin newspapers picked it up and added details : https://www.tagesspiegel.de/berlin/nach-beteiligung-an-palastina-protesten-in-berlin-drei-eu-burgern-und-einem-studenten-aus-den-usa-droht-ausweisung-13468543.html