Marco Rubio continually loses his way and forgets that the main stream of American society is feeling alienated and disenfranchised. And it seems that Rubio can be bought and will change, chameleon-like, depending on who he is talking to and what he hopes to benefit from them.
Of course, the biggest mistake he made is with the Gang of Eight and the amnesty program. He made common cause with Democrats who want lots of new Latino voters who will be Democrats for life if they are given amnesty. He did this to unite with big business, which means donors, who want cheap labor. He ignored the fact that millions of illegal immigrants are flooding the country, taking jobs that Americans will do, taking lots of government services, and disrupting societies and standards. There is no attempt to assimilate, only to impose. Rubio later tried to explain after it cost him his credibility, but he was caught lying. His believability has sunk to new lows, and now he has decided to throw in with another group that is not interested in assimilating. He is simply digging a bigger and bigger hole.
Rubio against U.S. citizens again, page 2:

What a loser dog following the masters.
agree
No it’s not you piece of filth. You don’t give enemies weapons moron
well rubio, it
What a quisling this one is! Let him go shoot with his local muslim pistol team.
If it’s a private owned business they can refuse anyone for no reason, and we will support them
“Not refugees that we know nothing about!!!” Common sense that he does not have.
rubio can stand out front so they shoot at him What kind of dumb question. We do not want them here not alone shooting practice.
Nope
Rubio is such an$#%&!@*!