Does Israel have a right to exist?

No.

If Israel has a right to exist, then so does Iran, and any other nation. But this "right to exist" is only ever stated of Israel, because it's used as a defense of the specific project of Zionism. A project I disagree with. So no, I do not believe in the "right" of the ethno-nationalist state of Israel to exist.

The Talmud contains The Three Vows Argument: This perspective argues that God imposed three oaths on the Jewish people when they went into exile: not to force themselves back into the land, not to rebel against other nations, and not to hasten the redemption.

Rejection of Secular Zionism: Some Orthodox groups believe that creating a Jewish state by human power (secular Zionism) is a theological error and a rebellion against God, asserting that it should only happen in the messianic era,

So, many Jews themselves believe they shouldn't have a homeland because it is a sin against God. Of course, others interpret the Talmud differently, but it's not necessarily anti-Semitic to say they shouldn't have a homeland. Of course, those on the right don't think too deeply about such subjects. Knee-jerk reactions are their forte.

It isn't the fault of the current generation of Israelis, that their nation was built upon the graveyard of native peoples. People should have a right to live where they were born, ideally, and the existence of an Israeli state in modern times makes sense in upholding that right.

However, Israel has, through its actions, chosen to make its existence incompatible with the existence of other nations and peoples in the Middle East. For that reason, it has lost its right to uphold itself as a political entity.

You present this as if the issue is theoretical.

It is not.

Just like any other nation, Israel exists.

What Israel does not have the right to do, is occupy the West Bank and wage a war of near extinction, directly through sustained carpet bombing and making living conditions impossible in Gaza.

I SUPPOSE so but that opinion gets thinner and thinner with each passing day

The mask slips

The greater Israel project

Every nation with territorial rights is an artificial construct. Why start and stop with Israel?

Pfft, all countries borders are an artificial construct.

Why are you singling out Israel?

No