What would you as an older woman who is 40+ do if you see a man your age group being mean to me?

Not on this site but on Quora, i saw this 57 year old man being mean and racist to someone so I messaged him asking whats up and why is he being so racist but he gave me mean replies and doesnt even care that he is hurting someone being racist. He is not just racist but also a creep. I saw his following and he follows some young girls for real so I questioned him about it but he doesnt care and its none of my business why he follows them and he feels its not wrong to just follow them. I even threatened him that I would share screenshots on Quora but he didnt care. Suddenly he saw my posts that I am 23 and never had a girlfriend and also about my posts related to asking advice about my crush Akankshya so he started making fun of me and insulting me saying I must be really ugly that I am 23 and still can't get a girlfriend and kept bragging how he has been dating at a much younger age. He also said if he comes to Bangalore in India, he is sure my crush would go for him instead and reject me even though she is 21-23 age range and he is 57. Its big fight and kept on insulting me for being single at my age and telling about how Akankshya would go for him instead. So older women in his age group, what would you do if you see him saying all that to me?