Reserve 2 whole canned tomatoes and finely chop the rest.
In a blender or food processor, puree remaining canned tomatoes and liquid with the red wine vinegar, olive oil, tomato juice, garlic, salt, and oregano.
Pour mixture into a large bowl. Chop the 2 reserved canned tomatoes and add them into the bowl along with the celery, jalepeno, cayenne pepper, cucumber, red onion, and green bell pepper. Cover tighly and chill for at least 8 hours or up to 3 days.
Serve cold. Just before serving, mix in avocado.