Most historians believe Jesus existed as a historical figure.
Actually, there's still an awful lot of debate about that. But even a guy named jesus did exist, that doesn't make him devine.
There are the gospel accounts written within the lifetime of the disciples.
Even if they were, it doesn't make them true or accurate. Imagine someone discovering a tabloid article 2000 years from now. It might be full of absolute rubbish about real people we know to have existed.
There are accounts of Jesus in the talmund, and other Jewish writings. I.e. Talmund stated Jesus was a sorcerer and was leading the people astray as a reason for execution.
No amount of writing makes the story true. This isn't the evidence which you think it is.
The Jews themselves acknowledge Jesus existence but believe he was a false prophet- surely if they wanted to discredit Christian belief they would deny his existence.
This is an argument from ignorance. "I can't think of any reason the Jews would acknowledge Jesus' existence other than because he was real, therefore Christianity is true". Nope, sorry, that's a really bad argument.
The fact the apostles and early Christians were executed, in the most horrendous ways, for something that they made up is improbable to me.
Another argument from ignorance.
So you saying my belief is based on nothing- is incorrect.
Your belief is based on insufficient evidence. That's what 'faith' is.
Likewise I have reasons why I believe other religions are incorrect.
Which are probably largely the same reasons atheists and other followers of other religions think that Christianity is incorrect.
And anyone has the right to believe anything they choose without being called arrogant just because they don't think the same as everyone else.
You can believe what you like, but if you then assert those beliefs to other people in an arrogant manner, then of course anyone else has the right to call you arrogant. You don't have a mythical, protected status because you are a Christian.
It is quite possible for religious people to politely disagree on their beliefs without being "arrogant" or "intolerant"
Except often they are not. See also: History.
Simply saying something is true/untrue is not intolerance
Saying something is true without sufficient evidence and asserting that you know it to be true when you could not possible know such a thing is incredibly arrogant.
What I think is ignorant is saying that believers don't have the right to not accept other religions as equally valid- because this doesn't show respect for any religion and demonstrates a lack theoretical knowledge.
There are so many negatives in this sentence that I'm not sure I really understand what you're trying to say. But I don't believe that any religion deserves respect. Certainly not the privileged position that many major religions have enjoyed for centuries.