I agree with Goose. The topic is contradictions, but, at best, you have provided differences in the accounts, not contradictions. This is a contradiction:
John is a man. John is NOT a man.
In other words, something cannot be one thing and its exact opposite at the same time. Put another way, something can't be true and false at the same time in the same sense.
Can you offer real contradictions, ones that break the Law of Non-Contradiction and are not merely differences?
As for differences, there are valid resolutions for them. For example, let's take the issue of the sermon preached on a mount or on a plain. The word plain (tpou pedino) simply means level place. The mountains in that area of the world are not sheer drop-offs. They rise gradually and have level places. So both are correct.
As for Judas hanging himself and falling and having his insides spill out -- both are possible since neither negates the other. He could have hung himself and then, later, his bloated body fell down and split open.
Those are just two examples showing reasonable explanations for them. However, what I think is really important is this: We must understand that ancient biographies and histories had their own set of rules and they differed from modern biography and history. For example, in modern biography, we expect someone to start at the beginning of somebody's life and then write a chronological story, objective in tone, accurate to the most minute detail.
However, that's not how ancient biography functioned. The purpose was to reveal the character of the person being portrayed. Therefore, the writer wrote only what was needed to do that and they did so using chreia, that is, brief sayings or actions that made a point and were attributed to the person in question. Chreia took many forms. For example, they could be expanded or compressed, they could be a paraphrase, and they could include changes in the number of people involved. Speeches could be reconstructed by an author as long as they were credible and suitable for the speaker, audience members and occasion. But they did not have to be verbatim.
If you look at other ancient biographies, such as Plutarch's
Lives, and compare them to the gospels, you can see that they were written according to the rules of rhetoric at that time. And one of the characteristics was this: Unimportant details were not precise. But that doesn't mean they weren't accurate. It just didn't matter if you mentioned one woman at Christ's tomb or more. It had no bearing on the account.
Other devices included conflation (the author combines elements from two or more events or people and narrates them as one), displacement (author knowingly uproots event from its original context and transplants it to another), compression (author knowingly portrays events over a shorter period of time), spotlighting (one character is highlighted over another), and simplification (author adapts material by omitting or altering details that may complicate the overall narrative). And material could be rearranged and placed at different places and times to make a point rather than merely present it all in chronological order. We see all of that in the gospels as well as other ancient biographies -- but these devices do not render the information presented false.
Bottom line: When it comes to major doctrines such as salvation and the identity of Jesus Christ, etc., you won't find any discrepancies.
I think it is unfair to measure ancient history and biography according to modern rules. It's what C.S. Lewis would call chronological snobbery.
For more, read
Why are There Differences in the Gospels? by Michael Licona and Craig Evans which is reviewed here:
https://themelios.thegospelcoalition.or ... biography/