Consider the first word, for. The word, For, means the second interpretation is correct. Leave For out and the first interpretation is correct. For indicates it addresses not all but a specific group: this message is For those who think it all negative.
In Zille's tweet, she used a comma, that comma means we are urged to think about the items she listed as positives after the comma against the negative listed before the comma. The word, think, is not the doing word. First quote does not have a comma, the word for indicates what to consider or who needs to consider. There is no ambiguity, For addresses those who think all was negative to consider such positives as soap. Here we speak of correct usage of language to convey our message, what does it matter when language is used to convey such a message. Disgrace. Love, love is a verb, love is a doing word... Shalom to our brothers and sisters.