On Thunderbird for example, there's no way to aggregate feeds from different places, into just one common view. I'm looking for aggregating all feeds from different places into a common view, where I can globally just keep what I want to read from everywhere and remove what I'm not interested on.

Notice just the view needs to be joint, and one can remove stuff from the joint view, but in reality one would be removing stuff from each feeds provider.

Not sure if such client is available for gnu+linux, and hopefully a GTK one.

Edit: Trying newsflash. At the beginning I didn't want to try webkitgtk based packages, since it was supposed to be insecure, however stock packages are depending on it, so I guess there's no much trouble now a days. webkit2gtk was the safe bet that I remember. So considering this query as solved for now, :) Many thanks to all.

Edit 2: On TB I can remove feeds I don't want to keep, which rss readers can do that? On newsflash at least I don't see a way to remove stuff. So for sure that'll consume a lot of space depending on the amount of articles. Or am I missing something?