There is some truth to the assertion that there's more hate crimes against Muslims. However, the headlines don't tell the whole story. Take this article on CNN, entitled FBI: Hate crimes spike, most sharply against Muslims. It makes it sound like there's a massive number of hate crimes being perpetuated, but reading the article you realize that's not the case (emphasis mine)
In one year, anti-Muslim hate crimes in the United States rose 67%, from 154 incidents in 2014 to 257 in 2015, according to the latest numbers released in the bureau's Hate Crime Statistics report on Monday.
In sheer numbers, anti-Jewish incidents (664) were higher in 2015, but the percentage increase was much higher for incidents involving Muslim victims.
Just in case it's not clear, while the percent went up 67%, the actual numbers went from 154 to 257 over one year. That's for the entire country of 330 million people. There were also 62% more hate crimes against Jews vs Muslims in the same period. But this puts the 257 crimes into perspective. The FBI 2015 crime statistics say
In 2015, there were an estimated 1,197,704 violent crimes.
That's about 0.0002% of all crimes were hate crimes directed at Muslims.
Another problem is that there have been some people reporting fake hate crimes against Muslims to sway political opinion against President Trump
A student at the University of Louisiana at Lafayette fabricated a story that she was attacked and had her hijab rippped off, police said Thursday.
The attack was one of several reported in the wake of Donald Trump’s election victory.
In a press release Thursday afternoon, the Lafayette Police Department said that during the course of their investigation into the woman’s complaint, she “admitted that she fabricated the story about her physical attack as well as the removal of her hijab and wallet by two white males.
“This incident is no longer under investigation” by the department, the statement said.
So to sum this up
- Muslim hate crimes, as a percentage of overall crime is very low. It's gone up some, but the press sensationalizes the percentage, rather than the number.
- Hate crimes are still investigated and prosecuted in the United States and that will not change, regardless of who is the President.
If your sister suffers an attack it's far more than likely it's just regular crime as opposed to targeting her for being a Muslim.