I guess He is capable of that. But He would never do that, as it would go against His own nature or character. It would be against His own will. He cannot or would not defy Himself.
Our God is a God of relationships, He understands perfectly human relationships. That could never be so, if He were in the singular only. And far away and aloof from mankind. Thank God, He came to us, as one of us, in the man Christ Jesus. To die taking the punishment for our sins, only to rise again from the dead, as He said He would. He rose, thereby proving His power over death and hell for all who would believe. He knows us better than we know our selves.
And when we put our faith and trust in Him, we become one in Him and He in us. Just as He is one in the Father God. But the doesn't mean we become God, only that we as the whole church become like a bride of Christ.
https://www.biblegateway.com/passage/?search=John%203%3A14-17&version=NIVUK;NKJV