Hitler was famous for knowing how to use the propaganda technique of the "Big Lie" to fool people. As he himself explained, the technique was to create a lie so impossibly outrageous that people would judge it just had to be true, because they simply would not be able to imagine how anyone could fabricate such a monster.
Now, suppose you noticed some contemporary politician was using the Big Lie technique. Further suppose you told people, "He's using the Big Lie technique that Hitler described in his biography".
Logically speaking, would that necessarily mean you were saying the politician was "just like Hitler", or "Just as bad as Hitler"?
I don't see how any honest person can answer "yes" to that question, unless they are merely confused.
It seems to me the OP is stating no more than this: That Trump's treatment of immigrant children is similar to, or the same as, Hitler's treatment of immigrant children in his own day and age. I just can't find anywhere the OP says, "Trump is Hitler", or anything along those lines.
I suppose someone might say, "Well, the OP could be taken to mean 'Trump is Hitler', even if it cannot be proven that it does indeed mean that." But I disagree that it could be taken that way without jumping to that conclusion.
There is a name for thinking the worse of someone, rather than giving folks the benefit of the doubt: "Bad faith".
Bad faith is always intellectually dishonest.