For example, they always open doors, most desi guys just walk right in. In an elevator white guys always wait until all the ladies are out, desi guys just walk right out.
All these examples you give just display sexist behavior.
I hope you do realize that people have been sued in courts of law for sexist behavior simply because they opened the door for a woman and she felt offended. This is 21st century. Feminist Movement Zindabad!
Presumably women can do anything a man can do (and better too!), so women should not expect (nor demand) such displays of masculine chivalry (or chauvinism?) to bracket the guy as "decent".
Just FYI.
The rest of your points are just rampant stereotyping so I can't get into that. It would be one thing if all desi men behave one way and all American men behave the other. What about American desi men, by the way? Are they the best of all worlds or worst of all worlds?