KL is way safer than most Spanish cities but maybe way less "homeless/beggars" than KL.
Paris Rome and Barcelona are notorious but throw in Berlin and Frankfurt as well.
Sometimes I'm glad walking down KL not to worry about this stuffs.

The only shit I'm afraid of are Kelantanese kaki paw near CM and KTM/POS Malaysia around mid 90s
and also last time Pududraya also got a lot of scammer/aggressive touts/kaki paw