Assuming bad faith without evidence is a big part of the issue here.
You specifically asked "What's the ulterior motive here?" which implies you think there is an ulterior motive. An ulterior motive would be acting in bad faith, since it would by definition be different than the expressed motive, since the reasoning was clearly expressed above.
Presentation matters. Whether you meant it to be or not, your statement is somewhat inflammatory, for the reasons I just outlined. In my opinion, it's also a very good reason why the temporary ban is a good idea.