Comparing this to a serious crime, which is not an acceptable behavior in all levels and morals, is not only bad, but horrendous. However, the comments from Deceived is nowhere warning worthy. In fact, he already clarified to you in the screenshots you used for your report that he is direct to you in terms of he is not going to lower his language for you to understand him.
Saying that someone is “fundamentally wrong” is not necessarily an insult or disrespectful in and of itself. However, it is important to consider the context in which the statement was made and the way it was delivered. If the statement was made in a respectful and constructive manner, with the intention of engaging in respectful discourse and trying to understand each other's perspectives, it may not be considered disrespectful. On the other hand, if the statement was made in a dismissive or condescending manner, or if it was intended to belittle or demean the other person, it could be considered disrespectful. It is essential to communicate in a way that is respectful and considerate of others, even when expressing disagreement or criticism.
Sure, in general, it is more productive and respectful to communicate in a way that is respectful and considerate of others, even when expressing disagreement or criticism in general, it is indispensable to try to foster a positive and respectful environment within any community, and to take steps to address behavior that is not in line with that goal.
Also, he did not call you "******* stupid", he is actually giving you an instance of the definition of "Being direct" which you obviously failed to understand it.