There is no scientific controversy. The only controversy is religious and/or philosophical. So if we want to teach the philosophycontroversy, that should be done in religious or philosophy classes, not in science classes.
So here is the problem that I see: This systematic suppression of ID is nothing less than coercion.
I haven't seen any evidence of this alleged "systematic suppression". What I have seen are objections to putting it in the science classroom (where it does not belong).