I read into it because your tone was very much that of someone who feels entitled to other people’s effort and time, and you spammed the exact same comment all over the place.

You could have written “I’d love to learn more, do you have a tutorial or walkthrough that you found helpful?” or formulated the question in any other way that demonstrates a respect for the commenter’s time and any effort they may put into finding a tutorial they think you would enjoy.

“So, where is the walkthrough” implies (at least to me) that what you are really saying is “obviously you must have written a walkthrough, or else your comment has no value, so why haven’t you given it to me.” It reads like a challenge, and given the way you’re communicating now, I feel justified in this reading.

A simple question can still be rude, and yours definitely sounded rude. I tried to give you room to exercise the benefit of the doubt, but based on this and your other comment, you just are entitled. Have a nice day.