It is bullying to mock [closed]

'It is bullying to mock a foreign speaker’s accent. No one deserves to be laughed at for their pronunciation.'

I　don't quite understand why bullying (present participle) is used. I don't think it is the present continuous tense. Or, is bullying a gerund here? Can someone help with it? Thank you.

Solution 1:

Bullying is a noun here. Compare:

It is a mistake to mock a foreign speaker's accent.

The noun bully denotes a person, so bullying is used to name the act with a meaning similar to intimidation.

Merriam Webster:

bullying

noun

abuse and mistreatment of someone vulnerable by someone stronger, more powerful, etc. : the actions and behavior of a bully