I believe if you report this conduct to the police you will be told this is a civil matter for the divorce court to solve. Since you did not do anything to cause the heart attack you have a solid defense if you are ever charged.
Stay off the internet and social pages, unfriend facebook persons that offend, and in time this will pass.
Good luck to you.
God bless. Best of luck to you.
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This is typical crazy ex conduct that many a pro se defendants pull while your divorce is going on. I don't know how severe it's getting (Whether his outbursts are sporadic or intensifying), if it's starting to get worse, I'd consult with a local family law attorney about options, including an Order of Protection (If warranted under the facts).
Wheaton has their fair share of quality attorneys - you can even contact the DuPage Bar Association of a low cost referral.
Best of luck.
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