He praised one thing, and motivated that praise. It's 100% possible to disagree, but I don't find it concerning at all. I find it reasonable, because proton can better protect the privacy of users if more people can choose freely privacy oriented tools (like proton). Hence, if Trump does or says something that can help moving in that direction, it can be labeled as a good thing. Not every sentence is a collective or global assessment of all things considered.

When Trump wants to break up big tech it's because he wants to eliminate the competition to his concentration of power.

• this is something US citizens should concern themselves
• it is only tangentially irrelevant
• if by breaking up monopolies people will be able to choose more privacy-preserving services, what you think is Trump's goal will fail anyway. More privacy and less data is also a way to limit the amount of demographic targeting he uses so well in his campaigns.

So I am good with him doing the right thing for the wrong reason, and I wish him a swift failure afterwards.

doesn't understand this or doesn't care is deeply concerning

Have you considered that he might not agree with what is just your opinion? Obviously you are free to draw any conclusion you want and not use them.