You literally quoted, verbatim, Larry Elder's (of Prager "University") entire premise. How did I know that's exactly where you got that idea from? Some of us actually read widely, from multiple national & international sources to gain knowledge, rather than seek confirmation bias as to our political opinion.
You'd be far better served by reading the entire Wikipedia page on Kennedy than actually believing the skewed perspective this guy is trying to promote. At least Wikipedia's portrayal is largely accurate, reflecting his entire philosophy rather than merely cherry picking issues that serves a particular partisan agenda.
In brief, here are some actual facts about Kennedy: he was Irish Catholic (at at time when both were still being highly discriminated against in the US); Catholics then, as now, don't believe in abortion nor divorce (though it's amazing how many of them still find a way to have their decades long marriages annullled by the church - rendering their children 'bastards' - in order to dissolve their marriages and remarry, with the Church's blessing). Kennedy was also a highly reckless serial philanderer - having many affairs throughout his marriage - at times posing a high security risk to the US. Do you want to embrace that too?
He was also a strong proponent of civil rights, better housing for veterans, better health care for all, organized labor's drive for better working conditions & more reasonable hours, ecological preservations, public housing, improved educational standards, non discrimination of immigrants, peaceful resolutions to complex issues, separation of Church & State in political issues, and favored - against his advisor's advice - a balanced budget over reducing taxes, etc, etc, etc.
He was appalled by the death penalty, as too Senators putting their own self serving careers over their public duty (which we see today with almost every Republican in Congress propping up Trump's elections lies, knowing full well he legitimately lost the election). His book "Profiles in Courage" addresses those issues.
So tell me again how Kennedy's suddenly become MAGA's poster boy when he was largely always its antithesis
BTW... I doubt you even know that the only reason why the USSR ever put missiles into Cuba was because the US had previously put missiles into Turkey, aimed at the USSR. That's an inconvenient fact that largely gets suppressed in US media, though never in international news, nor in history books.