Why did my ex boyfriend text me on the holiday?

I dated my ex for a few months, we broke up on his terms after he lost his job and had a nervous breakdown saying he has his own issues. I suspected he went psycho. He seemed unsure about his decision when we broke up and tried to stay in contact only for big moments in our lives the past 1.5 months. He finally got mad at me for saying some mean things to him since he was treating me poorly. He took me off facebook and said he didn't want to talk to me if we were going to fight. I wrote him an apology note a week ago and got no response. He sent me a text on Thanksgiving saying "Hi there, I hope you and your family had a great Thanksgiving." Why would he text me after pushing me completely out of his life and not even mention the note? I know it's not a mass text because of the greeting and knowing what kind of contacts he has on his phone. Help!
Why did my ex boyfriend text me on the holiday?
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