Why i am NOT a jaegerist (attack on titan)

For context, "jeagerist" or "yeagerist" is a term in the anime 'Attack On Titan' that describes a group of people who were anti-Marley.

These people believed that the only way to save Eldia was to dedicate themselves to Eren Jaeger and he would rule over them with the Founding Titans powers.

I don't understand how people can be "jaegerist" (people who support Eren's actions) from the watchers perspective when they literally were for wiping out 80% of humanity. They basically thought that the subjects of Ymir were more superior and that everyone else deserves to die.

While, it is agreeable that paradis island was under attack by titans and suffered a lot, I still wouldn't want to wipe out millions of innocent people who aren't even involved in the conflict.

Furthermore, I also don't think it's okay to be xenophobic, racially supremacist or genocidal. The combination of these things are basically the jaegerists summed up lol.