I don't see how that follows.
Because you need to get to imperialism via capitalism.
Socialism's goal is to provide for its people; in theory, why can't it engage in colonialism to bring in resources to benefit its people?
There is definitely no other way.
Its obvious how capitalism leads to imperialism, but it's definitely not obvious how that would be the only way to arrive there.
Any elaboration you can provide would be great because you're acting as if it should be obvious why what you're saying is true but it absolutely is not.
No point lying. If you check the modlog plenty of his comments get removed. You can check for yourself.