In all honesty, what do you care?
If Judaism preached that all Christians are fated to be spend eternity in the form of watermelon Gummi Bears, it wouldn't matter to me in the least.
I may find such a belief to be incompatible with mine, but as long as the Gummi Gospel doesn't affect my life, then mazeltov.
We don't preach that so it is a moot point. At any rate, Jews are such a small minority that you can not comprehend what it is like to have the vast majority of people that you respect referring to what your beliefs are as not only "wrong," but doom you to the fires of hell. It does not so much matter to me as it does annoy me that this view is accepted as "mainstream" and in no way meant for Jews to take any offense. Can you not see that being in a small persecuted minority destined for extinction might make these disagreements a little more sensitive? Can you not comprehend that on your Christian majority protected perch?