Yep. Politics.... but some of them were eyed with suspicion by the respective doctrinal institutions.
Didn't Eckhart get accused of heresy and summoned to appear before the inquisition?
Eckhart was called before the Inquisition by Henry of Virneburg, the Archbishop of Cologne. It's not clear why. The Archbishop was very conservative and may have found some of Elkhart’s ideas troublesome. Further, he was a Franciscan, and at the time political infighting between the Franciscans and the Dominicans was at its height.
It's now generally held that he used language which is open to misinterpretation, but his foundations are orthodox and there is no question of heresy. The charges made against him can be argued and there's little doubt Eckhart would have won his case if he had lived long enough.
But such is often the case. Origen suffered the same. St John of the Cross suffered dreadfully under his abbot. In fact, in the Fathers of the Church, there is only one (St Gregory Nazienzen) who has never been questioned regarding his orthodoxy. Teilhard de Chardin is another example who has been condemned for certain ideas, but lauded for others ...
The New Age et al delighted in declaring Eckhart a 'Zen Christian' and insisted he was thinking 'outside the box' of Roman orthodoxy. Not true, really, they're just trying to create an artificial gap between him and the Church because they can't bring themselves to accept his orthodoxy.