When the third party candidate admits that their campaign is solely to siphon away votes from Democrats? And the Republican alternative has actively stated Palestine should be wiped out by Israel?

Can't vote Democrat because support of Israel. That means you also can't support Republicans, because they support the full extent of the genocide even more. And that means you can't support (most) 3rd party candidates, because the Green Party is primarily funded by Republican donors and, quote,

"Trump, has embraced Kennedy as an ally, has previously spoken fondly of both Stein and West.

"Cornel West, he's one of my favorite candidates," Trump said during a campaign rally in Philadelphia in June. "I like her also, Jill Stein, I like her very much. You know why? She takes 100% from them. He takes 100%."

So that leaves us with... A candidate who at least is saying a 2 state solution, and one who told Israel to finish the job. Plus you know, all of the American focused policies, such as education.

With this in mind, and with how the events of 2016's election turned out, you can understand why people are suspicious about 3rd party voting, right?