Is it correct to use "insultive" in place of "insulting"

So I was watching a video on youtube (https://youtu.be/hfXXbmTpkrw?t=377) where the "host" of the show (I don't know if you can call him that) is commentating on a video of a famous youtube personality being offensive to one of his fans. He uses this sentence:

(the "host" of the show): He's being incredibly insultive to the guy.

Now, why didn't he use the adjective insulting to refer to the guy, as in:

He's just being incredibly insulting to the guy.

Mind you, I wasn't able to find a definition of the word "insultive" in many well-known dictionaries online such as, Cambridge, Collins, Or Webster, but some lesser known dictionaries provid a definition, stating that it's synonymous with insulting.

Also https://en.wiktionary.org/wiki/insultive says about it:

This word (insultive) is about 0.01% as common as insulting and does not appear in most dictionaries.

I also did an Ngram look-up which confirmed the above.

is the use of "insultive" totally and utterly wrong? should it be avoided?

The speaker seems to be thinking too hard. He is describing the description and in doing so has built a word in the process. Rather than insulting he has come across insultive. A description of the tendency attributed to the host.

From Dictionary.com;

In using a suffix of adjectives (and nouns of adjectival origin) expressing tendency, disposition, function, connection, etc.: active; corrective; destructive; detective; passive; sportive.

and no doubt restive.