Ueshiba was martial and when someone can act like him to any degree they can use him as an example. He visited many a dojo and took what he could from each. No challenges, no put downs, no going around saying how useless so and so was. He visited and did as per instructed. If there was something to learn he stayed a while, if not he politely bowed and left.
Actually, I can think of a number of disparaging remarks - but maybe he wasn't a "true martial artist".