Why? Leftist people would also get more diverse recommendations. They'd be exposed to arguments such as the importance of maintaining western values etc. I actually did an experiment of wading through videos recommended based on anti-Merkel stuff. There are very few reasonable discussions and mostly it's horribly populist and poorly researched stuff.
What exactly are western values, other than a not-so-subtle way of asserting hostility to Muslims? The people who go on about the importance of opposing immigration in the name of maintaining liberal and tolerant values (a code word for 'gays and feminism') seem to be exactly the same people who hate gays and feminism in the first place.
> What exactly are western values, other than a not-so-subtle way of asserting hostility to Muslims?
For example that no death threats are spoken when a daughter defies her farther's will who she is supposed to spend time with. That caricaturists, satirists and atheists are safe. These are things that western cultures have established, and which could arguably be endangered by letting in refugees by the millions and by prohibiting cultural criticism at the same time. I am myself not convinced of the urgency of this threat, but I think these are some of the more convincing arguments against Merkel's refugee politics. Other arguments are for example second order effects or equilibrium effects, e.g. that conservatives, professionals and business folk amount to a counter-reaction that is worse than letting in refugees in a more controlled way (i.e. Brexit and brain drain).
> exactly the same people who hate gays and feminism in the first place.
I have no idea about the numbers, but I am pretty certain both groups exist. Those who use these arguments as pretense and those who are honestly concerned about the efficiency, safety and trust our culture has established (which e.g. allow us to focus on education, art and science).