A democracy cannot work if the will of the people is not enforced. part of that is enforcing the laws that those people have put in place. To argue that someone can be voted in against that is, indeed, undemocratic.

You’re looking at the end result and ignoring the process that leads up to it. Given that the main violation was constitutional, the amount of effort needed just to make that into law requires a significant amount of representatives or straight up popularity throughout the country. This is not something that should be lightly brushed aside.

So yes, if they’re not eligible, they’re not eligible. Because by supporting your stance it is also damning the stance of many others both past and present.

I would also argue you shouldn’t find much issue with finding someone you can vote for that hasn’t performed the very uncommon crime of treason.