But he switched worldwide allegiance to England in February.
Asked how he thinks England supporters will react to Rice, Southgate replied: "I think they will understand both the situation he's found himself in, in transferring across [national teams], and the situation he's found himself [with the social media post]".
"I recognise now my attempt to show support for my team-mates at the time could be negatively interpreted".
"While my naive words were not meant to be a political opinion and do not represent who I am, I sincerely apologize for any offense caused".
Fabian Delph left played just under an hour against Swansea last weekend
The West Ham player was granted approval by Federation Internationale de Football Association earlier this month to change his worldwide affiliation to England, his country of birth, after playing three friendly games for Ireland. Ideally you'd have them all playing regularly and ideally they'd have a certain number of games for their clubs, but I can't wait for that.
"Marcus has been with us all week and arrived with a problem with his foot", Southgate said. Kane is 7-2 with Ladbrokes to score first but I've read he could be a doubt so check latest team news.
The Chelsea prospect, 18, was this week promoted to the senior squad for the games against the Czech Republic and Montenegro.
'That's a great benchmark for us, and with the quality of young players coming through, there is no reason we should allow those standards to drop, because there's real competition for places. I played with him at Liverpool and speak with him regularly.
"This was when he was 15 or 16 when he was engaged in a social conversation with friends", said Southgate, who hadn't spoken to Rice about the posts. We've all probably said things, written things that would look different several years later.
Speaking at the time, he said: "Like so many people around the world, I consider myself to be of mixed nationality. Our fans or our public will understand that fact".
Meghan McCain calls Trump’s criticisms of her father 'new weird low'
Mitt Romney of Utah is the only other Republican lawmaker who has publicly criticized Trump by name for his attacks. Trump is still bitter about McCain's no vote on the Obamacare repeal in 2017, which killed the measure.