Considering that Trump has 0 legal education, I really wouldn't read that deeply into his tweets considering that majority of them end with "SAD! #MAGA".

If he wanted DACA to become a lawful program he wouldn't cut it so abruptly, he would say that he wants congress to act on it because he thinks the program is overstepping but will leave it as such until a solution is passed. Instead what happened is that Sessions and Bannon convinced him that Ivanka lookalikes will fuck him if he ends it, much to Trump's confusion as to why suddenly everyone wants his blood after the Sept 5th announcement. Then he backtracked and called on the congress to act as the program was basically set to expire.

Ask yourself why he isn't speaking much with Sessions these days. Hell only reason why Sessions still has a job is due to the republicans in the senate, they'd completely flip on Trump if he fired Sessions.