New members will also have to undergo training.
Aontú leader Peadar Tóibín will meet members of the party’s youth wing tonight after a secret WhatsApp group was found to contain racist and anti-semitic messages.
He said Ogra will be integrated with the Senior party "far more" so there is "far more oversight" and that new members will go through a training course.
Ógra Aontú leader John Bryan, a 21-year-old former local representative in the Clane area, has been expelled after an internal investigation.
Several other members have been suspended while inquiries continue.
In one private chat, Bryan allegedly reacted to a message from Ógra member Peter Irvine - who has left the party - about restricting children’s access to the internet and smartphones until they turn 16.
Bryan allegedly replied in agreement and added: “And my daughter won’t like brown people,” followed by a series of emojis including a white flag, ghost, church, swords and fire.
Other messages were also shared about immigrants and Jews.
Deputy Tóibín told Kfm the party is furious and said it was "sad" that such groups existed.
He said he had not been aware of Bryan’s views and only learned of the exchanges last Friday.
In a message to Kfm, Bryan apologised and described his actions as disgusting. One comment posted by Bryan referenced Hitler Youth and stated that his daughter would not like brown people.
Deputy Tóibín said new members will now undergo a training programme and that many Ógra activists are equally "disgusted".
He confirmed that the investigation is continuing and that anyone involved in similar behaviour in future would be removed swiftly.
He said no political party in the country is immune to such views, adding that his responsibility is to show leadership and provide young people with an "alternative" to hateful attitudes.

Sharp Rise In M9 Collisions With Garda Call-Outs Up Year-On-Year
Councillor Seeks Clarity On How Often Nightclubs and Late Bars In Naas Are Inspected For Fire Risks
New Figures From CSO Reveal How Much International Protection Applicants Earn Compared To Average Worker In Ireland
Unpaid Eight-Month Work And Training Placement For Adults With Disabilities Branded "Extremely Unfair"
Department Of Education Defends Kildare SNA Cuts Amid Claims Of Reduced Need At Some Schools
Naas Nurses Threaten Escalation As Staffing Row Deepens
Driving Tests Face Disruption As RSA Testers To Strike Next Week
Jury Delivers Not Guilty By Reason Of Insanity Verdict In Ballyfin Demesne Strangling Case