Says you. For us Jews, salvation is through faith in G-d (Whom you call the Father) and none other. He made a covenant with us, we don't need OR WANT to replace it with another one (and, in fact, if we do we have committed a grave sin - and the Jewish carpenter that you worship believed the same, it is his early followers who changed that).
We (Christians) want to share that with everybody. What, do you hate the Jews so much that you would deny them the Gospel?
Well thanks for wanting to share - I can't fault someone for the inclination to be generous. However, I would politely decline if you were to offer me some bacon, however well-intentioned that you might be. Similarly, I will decline your invitation to dis G-d by giving up my faith. Maybe, before you offer someone something, you should think about whether they can or want to accept it? Maybe, especially when a very little bit of research, and common sense, might inform you that such an offer is insulting. Maybe a little more research would teach you that similar "generous" offers in the past resulted - after rejection of said offer - in hideous violence against Jews?
You have your covenant, we Jews have ours. Leave us alone to practice our faith - we have no problem with you following yours. That is all that we Jews have ever asked.
Says you ...
Guess what, Sparky?
We can have this disagreement without slashing each others' heads off.
Ain't it grand?