"Sell all your belongings, give the proceeds to the poor, and follow me" might be construed as a call to support your neighbor not to mention an anti-capitalist, pro commie message.
Jesus was speaking this specifically to a young man that was asking to be his disciple. It was simply a test of his committment.
Mat 19:16 And behold, one came and said to Him, Good Master, what good thing shall I do that I may have eternal life?
Mat 19:17 And He said to him, Why do you call Me good? There is none good but one, that is, God. But if you want to enter into life, keep the commandments.
Mat 19:18 He said to Him, Which? Jesus said, You shall not murder, you shall not commit adultery, you shall not steal, you shall not bear false witness,
Mat 19:19 honor your father and mother, and, you shall love your neighbor as yourself.
Mat 19:20 The young man said to Him, I have kept all these things from my youth up; what do I lack yet?
Mat 19:21 Jesus said to him, If you want to be perfect, go, sell what you have and give to the poor, and you shall have treasure in Heaven. And come, follow Me.
Mat 19:22 But when the young man heard that saying, he went away sorrowful; for he had great possessions.
The lesson here wasn't that everyone has to sell their possesions. Jesus knew that this young man preferred wealth over Christ. When presented with a clear choice of follow Christ or keep your worldy possessions, he denied Christ.
All followers of Christ need to make similiar decisions. Will we give up anything to be true to Christ? Our jobs? Our homes? When the time comes, we may all need to choose.