Their reasoning is fucked, of course, but royalty is by definition one of the least democratic remnants of the past, so by in any way endorsing or even aknowledging the legitimacy of a sitting monarch, the so-called Democratic party go against the very core of what they pretend to believe in.

Sometimes awful people arrive at correct conclusions for horrible or at least stupid reasons.

The likes of Perjury Greene, Candace Owen and Tucker Carlson opposing the Israeli apartheid regime out of ACTUAL antisemitism is one such case and this is another.