A person wrote a tweet and you felt personally offended.
No
A cyber attack is a cyber operation, whether offensive or defensive, that is reasonably expected to cause injury or death to persons or damage or destruction to objects.
Michael Schmitt et al; Tallinn Manual 1.0, pp 92
- ❌ Cyber Operation?
- ❌ Expected to cause death or injury to people or damage to objects?
This Tweet does not match this definition. Here's a list of actual cyberattacks and and why this matters.